JPS6343227B2 - - Google Patents
Info
- Publication number
- JPS6343227B2 JPS6343227B2 JP3119380A JP3119380A JPS6343227B2 JP S6343227 B2 JPS6343227 B2 JP S6343227B2 JP 3119380 A JP3119380 A JP 3119380A JP 3119380 A JP3119380 A JP 3119380A JP S6343227 B2 JPS6343227 B2 JP S6343227B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- base material
- coating layer
- layer
- fluororesin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 38
- 229910052782 aluminium Inorganic materials 0.000 claims description 32
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 32
- 239000010410 layer Substances 0.000 claims description 32
- 239000011247 coating layer Substances 0.000 claims description 24
- 229910000838 Al alloy Inorganic materials 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 7
- -1 ZrO 2 Chemical class 0.000 claims description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 2
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 2
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 150000001247 metal acetylides Chemical class 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 2
- 229920002050 silicone resin Polymers 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 description 25
- 230000007797 corrosion Effects 0.000 description 25
- 238000000034 method Methods 0.000 description 14
- 238000010411 cooking Methods 0.000 description 11
- 238000000576 coating method Methods 0.000 description 9
- 238000011156 evaluation Methods 0.000 description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 238000007751 thermal spraying Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 238000004512 die casting Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000005422 blasting Methods 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 238000007750 plasma spraying Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 235000002639 sodium chloride Nutrition 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000002566 Capsicum Nutrition 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 241000467686 Eschscholzia lobbii Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000006002 Pepper Substances 0.000 description 1
- 235000016761 Piper aduncum Nutrition 0.000 description 1
- 235000017804 Piper guineense Nutrition 0.000 description 1
- 244000203593 Piper nigrum Species 0.000 description 1
- 235000008184 Piper nigrum Nutrition 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000005240 physical vapour deposition Methods 0.000 description 1
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 1
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 235000015067 sauces Nutrition 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 235000013555 soy sauce Nutrition 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000002982 water resistant material Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
Description
本発明はアルミニウム合金基材の表面に弗素樹
脂被覆を施した物品に関する。
近年家庭用品の表面処理法として、弗素樹脂に
よる被覆が多く用いられている。特に家庭用調理
器具のフライパン、ホツトプレート、炊飯器等に
は調理物の粘着防止および基材の腐食防止の目的
で、弗素樹脂被覆が広く用いられている。
弗素樹脂は非粘着性、低摩擦係数等すぐれた表
面特性を示し、調理物等のこげ付き、焼き付きを
防ぎ、弗素樹脂被覆は調理装置において、非常に
すぐれた被覆法である。
しかしながら弗素樹脂被覆には次のような問題
点があつた。
第１に摩耗環境において弗素樹脂が摩耗、剥離
することであり、第２に弗素樹脂被覆層中に存在
するピンホールによつて基材が腐食することであ
る。
詳述すると、調理装置の実使用において、調理
用ヘラ、スプーン、ハシなどで弗素樹脂の表面を
こする場合が多い。このような苛酷な摩耗環境に
おいて、弗素樹脂が徐々に摩耗して行き、ついに
は基材表面が露出し、本来のコーテイング目的が
失われてしまい、弗素樹脂の寿命に問題があつ
た。
この問題点に対して、従来は第１図に示す如
く、基材１をブラステイング等により表面拡大化
処理を行い、その表面にアルミナ等のセラミツク
ス粉末、ガラス粉末等の耐摩耗性粒子２を溶射技
術にて溶着した後、弗素樹脂被覆層３を形成する
方法が採られていた。
すなわち耐摩耗性粒子２で調理用ヘラ等による
摩耗が停止され、それ以上の弗素樹脂層３の摩耗
が防止される。この方法により従来問題点の一つ
である弗素樹脂層の摩耗、剥離等による、弗素樹
脂被覆の低寿命化が大幅に改善されていた。
さらに調理用装置は調理中に使用される塩、コ
シヨウ、醤油、ソースなどの苛酷な腐食環境に置
かれており、その耐食性の良否が商品イメージを
決定する。弗素樹脂は融点以上できわめて高い溶
融粘度を示すことが知られており、そのため微粉
末弗素樹脂のデイスパージヨン溶液を塗布、焼成
する過程において、弗素樹脂被覆層３には微少の
ピンホールの存在が避けられない。このため、こ
のピンホールを通過した腐食液が基材１を腐食
し、弗素樹脂層表面に白い腐食班点が浮いてきた
り、弗素樹脂層３が浮き上がり、剥離の原因とな
る現象が生じていた。
特に、基材として、Al純度が82〜88％のアル
ミダイキヤストが多く用いられており、この場
合、Si、Cu、Mn、Zn等の金属が添加されてお
り、局部電池反応による腐食が起りやすく、特に
耐食性に問題があつた。
一方、基材表面に溶射技術により、セラミツク
等の耐摩耗性をアツプすることが期待できるが、
溶射被膜はその構成上多孔質体となつており、若
干の耐食性向上は認められるが、大きな耐食性向
上は期待できず、未だ不十分であつた。
本発明は上記従来の弗素樹脂被覆層を有する物
品の耐食性をさらに向上させた新しい弗素樹脂被
覆層を有する物品を提供しようとするもので、以
下本発明の実施例について第２図を参照して説明
する。
第２図において、４はアルミニウム合金基材で
あり、このアルミニウム合金基材４の表面は表面
拡大化処理が行われている。５はアルミニウム合
金基材４の表面拡大化処理された表面に溶射形成
したアルミニウム溶射層である。６はアルミニウ
ム合金基材４の表面またはアルミニウム溶射層５
の表面に溶着された耐摩耗性粒子層である。７は
耐摩耗性粒子層６表面およびアルミニウム溶射層
５の露出表面およびアルミニウム合金基材４の露
出表面を覆う封孔処理剤よりなる被覆層である。
なお、この被覆層７は少なくともアルミニウム合
金基材４の露出表面を覆えばよい。８はこの被覆
層７を覆う弗素樹脂被覆層である。
なお、アルミニウム合金基材４は熱伝導性、加
工性、量産性、コストおよび加熱源となるシーズ
ヒーターとの接合性、絶縁性等の観点から選択さ
れ、通常はアルミニウムダイキヤストが用いられ
る。
形状はダイキヤスト時に金型を用いて、所望の
形状に加工することができる。
また、このアルミニウム合金基材４は基材表面
の油分および異物を除去するために、トリクレ
ン、アセトン等の有機溶剤を用いて、脱脂処理し
た後、基材表面をブラステイングあるいは化学エ
ツチングすることにより表面拡大化処理が行われ
る。
次に、一般的にアルミニウムあるいはアルミニ
ウム合金の耐食性はアルミ純度が高いほど良好で
あることが通常知られている。しかしながら通常
調理器の熱板基材としては前述した理由により、
アルミダイキヤストが使用されている。アルミダ
イキヤストのアルミニウム純度は82〜88％とかな
り低く、耐食性に問題がある。本発明実施例にお
いてはアルミニウム純度の低い基材４の高純度の
アルミニウム溶射層５を設けることにより、基材
表面のアルミニウム純度を上げて、優れた耐食性
を付与することができる。
アルミニウム溶射層を形成する技術としてはた
とえば次のようなものが考えられる。
ａ 溶融アルミニウムメツキ、
ｂ 蒸着、スパツタリング、イオンプレーテイン
グ、
ｃ 溶射法（プラズマ溶射、ガス溶射、電気アー
ク溶射）
ａの溶融アルミニウムメツキ法は700〜750℃の
溶融アルミニウム浴にアルミニウム合金基材４を
デイツプする方法であるがアルミニウム合金基材
４の融点は600〜700℃であるため、デイツプ浴中
でアルミニウム合金基材４が溶解してしまうため
不可能である。
ｂのPVD法により、アルミ層の形成は可能で
あるが、コスト性、量産性、作業性の観点から好
ましくなくｃの溶射法が好ましい。その中でも電
気アーク溶射法が最も好ましかつた。
また実験の結果よりアルミニウム溶射層のアル
ミニウム純度は93％以上が好ましかつた。
耐摩耗性粒子層６の形成は耐摩耗性粒子を溶射
技術を用いて、アルミニウム化された基材表面に
溶着する。
本発明に有効な耐摩耗性粒子はAl2O3、SiO2、
TiO2、ZrO2、CaO、MgO、Cr2O3、等の金属酸
化物あるいはその複合酸化物あるいはSiC、WC、
TiC、Cr3C2、BN等の金属炭化物あるいは金属
硼化物、ガラス粉末等よりなる群から選ばれる少
なくとも一種以上の材料が好ましかつた。これら
の耐摩耗性粒子を溶着させる方法としては密着強
度、寿命等の観点からプラズマ溶射が好ましく、
プラズマ条件としてはアルゴンガス、アルゴンガ
ス−水素、アルゴンガス−ヘリウムガス系が好ま
しく、特にアルゴンガス−ヘリウムガス系が特に
良好な結果が得られ、また溶射条件は二次側出力
条件が直流30V以上、電流600A以上の条件が好
ましかつた。
封孔処理剤の被覆層７はアルミニウム溶射層５
および耐摩耗性粒子層６が多孔質であるのでその
多孔質の空隙を通過した腐食液が基材４の露出表
面に到達して腐食を生じさせるのを防止するため
のものである。封孔処理剤としては耐水性、耐熱
性を有する材料で後処理コーテイングが効果的で
あり、水ガラス、シリカゾル、アルミナゾル、エ
チルシリケート、シリコン樹脂、リン酸アルミニ
ウムおよび耐熱塗料が好ましかつた。
この被覆層７は耐摩耗性粒子層６形成後、上記
封孔処理剤を３〜50ωt％の濃度で吹き付け、あ
るいは含浸付着させ、120℃以上の温度で水分を
除去すると、アルミニウム溶射層５および耐摩耗
性粒子層６の空隙部は封孔処理剤７により、封孔
処理されて、耐食性が著しく改善される。
弗素樹脂被覆層８は一般に用いられている弗素
樹脂を使用することができる。その代表的なもの
はポリテトラフルオロエチレン、ポリクロロトリ
フルオロエチレン、ポリビニリデンフルオライ
ド、テトラフルオロエチレン−ヘキサフルオロプ
ロピレン共重合体などである。
次に、上記実施例の弗素樹脂被覆層を有する物
品の具体例を示すとともに従来例と比較して説明
する。
まず、60×130mmのADC−10のテストピースを
基材４として用い、アセトンの超音波洗浄を行つ
て、脱脂した後、Al2O3系サンドブラスト材を用
いて、ブラステイング処理を行つた。その後、電
気アーク溶射により、種々のアルミニウム純度の
材料を用いて、50〜100μｍのアルミニウム溶射
層５を形成させ、アルミニウム溶射層５の純度を
種々変化させた。次に耐摩耗性粒子Al2O3をプラ
ズマ溶射にて溶着し、その後、5ωt％の水ガラス
溶液をスプレーガンで塗布し、乾燥させ、150℃
で焼付を行つた後、弗素樹脂を被覆させて試料と
した。なお比較のために、アルミニウム層を形成
させずに直接基材ブラスト面に耐摩耗性粒子
Al2O3を溶射した後、弗素樹脂を被覆させた従来
例の試料も作製して、耐食評価を行つた。その結
果を第１表に示す。なおここで耐食評価は腐食液
中に溶解するAl3+イオン量を定量したMDD評価
と弗素樹脂層８表面をカツターでクロスカツトし
て腐食液中に浸漬して腐食評価したクロスカツト
評価を行つた。
すなわちMDD評価は腐食液として１％NaCl＋
１％EDTA溶液を用い、その腐食液中に溶出す
るAl3+イオンを原子吸光分析法よりmg／ｄm2．
dayとして求める方法である。クロスカツト評価
は弗素樹脂層８表面をカツターでクロスカツト
し、５％NaCl中に48時間浸漬後、クロスカツト
部の腐食の度合を第２表を基準として評価する方
法である。
The present invention relates to an article in which the surface of an aluminum alloy base material is coated with a fluororesin. In recent years, coating with fluororesin has been widely used as a surface treatment method for household products. In particular, fluororesin coatings are widely used in household cooking utensils such as frying pans, hot plates, and rice cookers for the purpose of preventing food from sticking and corrosion of base materials. Fluororesin exhibits excellent surface properties such as non-adhesiveness and a low coefficient of friction, and prevents food from burning and seizing, making fluororesin coating an extremely excellent coating method for cooking equipment. However, the fluororesin coating had the following problems. Firstly, the fluororesin is worn and peeled off in an abrasive environment, and secondly, the base material is corroded due to pinholes present in the fluororesin coating layer. To be more specific, in actual use of cooking equipment, the surface of the fluororesin is often scraped with a cooking spatula, spoon, chopstick, or the like. In such a severe abrasion environment, the fluororesin gradually wears away, and the surface of the base material is eventually exposed, and the original purpose of the coating is lost, posing a problem in the life of the fluororesin. To solve this problem, conventionally, as shown in Fig. 1, the surface of the base material 1 is enlarged by blasting, etc., and wear-resistant particles 2 such as ceramic powder such as alumina or glass powder are coated on the surface. A method has been adopted in which the fluororesin coating layer 3 is formed after welding by thermal spraying technology. That is, the abrasion resistant particles 2 stop abrasion caused by a cooking spatula or the like, and further abrasion of the fluororesin layer 3 is prevented. By this method, one of the conventional problems, which is the shortening of the life of the fluororesin coating due to abrasion, peeling, etc. of the fluororesin layer, has been significantly improved. Furthermore, cooking equipment is placed in a harsh corrosive environment due to salt, salt, soy sauce, sauces, etc. used during cooking, and the quality of its corrosion resistance determines the product image. It is known that fluororesin exhibits an extremely high melt viscosity above its melting point. Therefore, during the process of applying and baking a dispersion solution of finely powdered fluororesin, the presence of minute pinholes in the fluororesin coating layer 3. is unavoidable. For this reason, the corrosive liquid that passed through the pinhole corroded the base material 1, causing white corrosion spots to appear on the surface of the fluororesin layer, and the fluororesin layer 3 to lift up, causing phenomena that caused peeling. . In particular, aluminum die-casting with an Al purity of 82 to 88% is often used as a base material, and in this case, metals such as Si, Cu, Mn, and Zn are added, which can cause corrosion due to local battery reactions. This caused problems, especially in corrosion resistance. On the other hand, thermal spraying technology on the surface of the base material can be expected to improve the wear resistance of ceramics, etc.
Thermal sprayed coatings are porous due to their structure, and although a slight improvement in corrosion resistance was observed, no significant improvement in corrosion resistance could be expected, and the results were still insufficient. The present invention aims to provide an article having a new fluororesin coating layer that further improves the corrosion resistance of the article having the conventional fluororesin coating layer. Examples of the present invention will be described below with reference to FIG. explain. In FIG. 2, 4 is an aluminum alloy base material, and the surface of this aluminum alloy base material 4 has been subjected to surface enlargement treatment. Reference numeral 5 denotes an aluminum sprayed layer formed by thermal spraying on the surface of the aluminum alloy base material 4 which has been subjected to surface enlargement treatment. 6 is the surface of the aluminum alloy base material 4 or the aluminum spray layer 5
A wear-resistant particle layer welded to the surface of the 7 is a coating layer made of a sealing agent that covers the surface of the wear-resistant particle layer 6, the exposed surface of the aluminum spray layer 5, and the exposed surface of the aluminum alloy base material 4.
Note that this coating layer 7 only needs to cover at least the exposed surface of the aluminum alloy base material 4. 8 is a fluororesin coating layer that covers this coating layer 7. The aluminum alloy base material 4 is selected from the viewpoints of thermal conductivity, workability, mass productivity, cost, bondability with a sheathed heater serving as a heating source, insulation properties, etc., and aluminum die casting is usually used. The shape can be processed into a desired shape using a mold during die casting. In addition, this aluminum alloy base material 4 is degreased using an organic solvent such as trichloride or acetone in order to remove oil and foreign matter from the surface of the base material, and then the base material surface is subjected to blasting or chemical etching. Surface enlargement processing is performed. Next, it is generally known that the higher the aluminum purity, the better the corrosion resistance of aluminum or aluminum alloy. However, for the reasons mentioned above, it is usually used as a heating plate base material for cooking appliances.
Aluminum die-casting is used. The aluminum purity of aluminum die-casting is quite low at 82-88%, and there are problems with corrosion resistance. In the embodiment of the present invention, by providing a high-purity aluminum thermal spray layer 5 on a base material 4 with low aluminum purity, the aluminum purity on the surface of the base material can be increased and excellent corrosion resistance can be imparted. Examples of techniques for forming the aluminum spray layer include the following. a Molten aluminum plating, b Vapor deposition, sputtering, ion plating, c Thermal spraying method (plasma spraying, gas spraying, electric arc spraying) In the molten aluminum plating method a, the aluminum alloy base material 4 is placed in a molten aluminum bath at 700 to 750°C. The method of dipping is impossible, but since the melting point of the aluminum alloy base material 4 is 600 to 700°C, the aluminum alloy base material 4 will melt in the dipping bath. Although it is possible to form an aluminum layer by the PVD method (b), it is not preferred from the viewpoints of cost, mass production, and workability, and the thermal spraying method (c) is preferable. Among them, the electric arc spraying method was the most preferred. Furthermore, from the results of experiments, it was found that the aluminum purity of the aluminum sprayed layer was preferably 93% or more. The wear-resistant particle layer 6 is formed by welding wear-resistant particles onto the surface of the aluminized base material using a thermal spraying technique. Wear-resistant particles effective in the present invention include Al 2 O 3 , SiO 2 ,
Metal oxides such as TiO 2 , ZrO 2 , CaO, MgO, Cr 2 O 3 or their composite oxides, SiC, WC,
At least one material selected from the group consisting of metal carbides or borides such as TiC, Cr 3 C 2 and BN, glass powder, etc. is preferred. Plasma spraying is preferred as a method for welding these wear-resistant particles from the viewpoints of adhesion strength, lifespan, etc.
Argon gas, argon gas-hydrogen, and argon gas-helium gas systems are preferable as plasma conditions, and particularly good results are obtained with argon gas-helium gas systems, and as for thermal spray conditions, the secondary side output condition is 30 V DC or higher. , conditions of a current of 600 A or more were preferable. The sealing agent coating layer 7 is an aluminum sprayed layer 5
Since the wear-resistant particle layer 6 is porous, the corrosive liquid that has passed through the porous voids is prevented from reaching the exposed surface of the base material 4 and causing corrosion. As the sealing agent, water-resistant and heat-resistant materials are effective for post-treatment coating, and water glass, silica sol, alumina sol, ethyl silicate, silicone resin, aluminum phosphate, and heat-resistant paint are preferred. After forming the wear-resistant particle layer 6, the coating layer 7 is formed by spraying or impregnating the sealing agent at a concentration of 3 to 50 ωt%, and removing moisture at a temperature of 120°C or higher. The voids in the wear-resistant particle layer 6 are sealed by the sealing agent 7, and corrosion resistance is significantly improved. For the fluororesin coating layer 8, a commonly used fluororesin can be used. Typical examples include polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinylidene fluoride, and tetrafluoroethylene-hexafluoropropylene copolymer. Next, a specific example of the article having the fluororesin coating layer of the above embodiment will be shown and explained in comparison with a conventional example. First, a 60 x 130 mm ADC-10 test piece was used as the base material 4, and after being degreased by ultrasonic cleaning with acetone, it was subjected to blasting treatment using an Al 2 O 3 based sandblasting material. Thereafter, an aluminum sprayed layer 5 having a thickness of 50 to 100 μm was formed by electric arc spraying using materials with various aluminum purities, and the purity of the aluminum sprayed layer 5 was varied. Next, wear-resistant particles Al 2 O 3 were deposited by plasma spraying, and then a 5ωt% water glass solution was applied with a spray gun, dried, and heated at 150°C.
After baking, the sample was coated with fluororesin. For comparison, wear-resistant particles were directly applied to the blast surface of the base material without forming an aluminum layer.
A conventional sample was also prepared in which a fluororesin was coated after thermal spraying Al 2 O 3 and the corrosion resistance was evaluated. The results are shown in Table 1. Here, the corrosion resistance evaluation was carried out by MDD evaluation in which the amount of Al 3+ ions dissolved in the corrosive liquid was quantified, and cross-cut evaluation in which the surface of the fluororesin layer 8 was cross-cut with a cutter and then immersed in the corrosive liquid for corrosion evaluation. In other words, MDD evaluation uses 1% NaCl+ as a corrosive liquid.
Using a 1% EDTA solution, Al 3+ ions eluted into the corrosive solution were measured by atomic absorption spectrometry in mg/dm 2 .
This is a method to find it as a day. Cross-cut evaluation is a method in which the surface of the fluororesin layer 8 is cross-cut with a cutter, and after immersing it in 5% NaCl for 48 hours, the degree of corrosion at the cross-cut portion is evaluated based on Table 2.
【表】【table】
【表】【table】
【表】
第１表から明らかなように、アルミニウム溶射
層５および耐摩耗性粒子層６の空隙の封孔処理を
行うことによつて耐食性が向上し、特にアルミニ
ウム純度が93％以上の封孔処理を行つた試料は耐
食評価ですぐれた結果を示し、従来例に比べ２〜
10倍の耐食性を示した。
次に本発明実施例の具現化例として第１表の試
料No.９と同一な条件でホツトプレートに適用し、
実調理における耐食評価を行つた。比較のために
従来例のホツトプレートについても同様な評価を
行つた。
実調理耐食評価としては塩、胡しようした肉
200ｇを焼く操作を１サイクルとし、その操作を
繰り返し、腐食が現われた時点で操作を停止し
た。
従来のホツトプレートは実調理試験操作約3000
回で腐食が現われたのに対し、本発明実施例のホ
ツトプレートは１万回繰り返しても腐食が見られ
なかつた。
以上詳述した如く、本発明の弗素樹脂被覆層を
有する物品は従来例に比べて、著しく耐食性が向
上し、その工業的価値は大なるものである。[Table] As is clear from Table 1, corrosion resistance is improved by sealing the voids in the aluminum sprayed layer 5 and the wear-resistant particle layer 6, especially when the aluminum purity is 93% or more. The treated samples showed excellent results in corrosion resistance evaluation, with 2 to 30% higher than conventional samples.
It showed 10 times more corrosion resistance. Next, as an embodiment of the present invention, it was applied to a hot plate under the same conditions as Sample No. 9 in Table 1.
Corrosion resistance was evaluated in actual cooking. For comparison, a similar evaluation was performed on a conventional hot plate. For actual cooking corrosion resistance evaluation, meat with salt and pepper
The operation of baking 200 g was defined as one cycle, and the operation was repeated, and the operation was stopped when corrosion appeared. Conventional hot plates require approximately 3,000 actual cooking test operations.
In contrast, the hot plate of the present invention showed no corrosion even after being repeated 10,000 times. As detailed above, the article having the fluororesin coating layer of the present invention has significantly improved corrosion resistance compared to the conventional example, and its industrial value is great.
第１図は従来の弗素樹脂被覆層を有する物品の
断面図、第２図は本発明の一実施例を示す弗素樹
脂被覆層を有する物品の断面図である。
４……アルミニウム合金基材、５……アルミニ
ウム溶射層、６……耐摩耗性粒子層、７……封孔
処理剤よりなる被覆層、８……弗素樹脂被覆層。
FIG. 1 is a sectional view of an article having a conventional fluororesin coating layer, and FIG. 2 is a sectional view of an article having a fluororesin coating layer showing an embodiment of the present invention. 4... Aluminum alloy base material, 5... Aluminum sprayed layer, 6... Wear-resistant particle layer, 7... Coating layer made of a sealing agent, 8... Fluororesin coating layer.
Claims (1)
合金基材表面に溶着されたアルミニウム溶射層
と、前記アルミニウム合金基材表面または前記ア
ルミニウム溶射層表面に溶着された耐摩耗性粒子
層と、少なくとも前記アルミニウム合金基材の露
出表面を覆う封孔処理剤よりなる被覆層と、この
被覆層上に形成された弗素樹脂被覆層からなる弗
素樹脂被覆層を有する物品。 ２ アルミニウム溶射層はアルミニウム純度が93
％以上であることを特徴とする特許請求の範囲第
１項記載の弗素樹脂被覆層を有する物品。 ３ 封孔処理剤は水ガラス、シリカゾル、アルミ
ナゾル、エチルシリケート、シリコン樹脂、リン
酸アルミニウム、耐熱性塗料の群から選ばれる少
なくとも一種の材料であることを特徴とする特許
請求の範囲第１項記載の弗素樹脂被覆層を有する
物品。 ４ 耐摩耗性粒子層はAl2O3、SiO2、TiO2、
ZrO2、CaO、MgO、Cr2O3等の金属酸化物ある
いはその複合酸化物あるいはSiC、WC、TiC、
Cr3C2、BN等の金属炭化物、金属硼化物、ガラ
ス粉末よりなる群から選ばれる少なくとも一種以
上の材料で形成されたことを特徴とする特許請求
の範囲第１項記載の弗素樹脂被覆層を有する物
品。[Scope of Claims] 1 An aluminum alloy base material, an aluminum sprayed layer welded to the surface of the aluminum alloy base material, and a wear-resistant particle layer welded to the surface of the aluminum alloy base material or the surface of the aluminum sprayed layer. An article having a coating layer made of a sealing agent that covers at least the exposed surface of the aluminum alloy base material, and a fluororesin coating layer formed on the coating layer. 2 The aluminum spray layer has an aluminum purity of 93
% or more, an article having a fluororesin coating layer according to claim 1. 3. The sealing agent is at least one material selected from the group consisting of water glass, silica sol, alumina sol, ethyl silicate, silicone resin, aluminum phosphate, and heat-resistant paint. An article having a fluororesin coating layer. 4 The wear-resistant particle layer is made of Al 2 O 3 , SiO 2 , TiO 2 ,
Metal oxides such as ZrO 2 , CaO, MgO, Cr 2 O 3 or their composite oxides, SiC, WC, TiC,
The fluororesin coating layer according to claim 1, characterized in that it is formed of at least one material selected from the group consisting of metal carbides such as Cr 3 C 2 and BN, metal borides, and glass powder. Articles with
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3119380A JPS56127449A (en) | 1980-03-11 | 1980-03-11 | Article with layer coated with fluorine resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3119380A JPS56127449A (en) | 1980-03-11 | 1980-03-11 | Article with layer coated with fluorine resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56127449A JPS56127449A (en) | 1981-10-06 |
| JPS6343227B2 true JPS6343227B2 (en) | 1988-08-29 |
Family
ID=12324582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3119380A Granted JPS56127449A (en) | 1980-03-11 | 1980-03-11 | Article with layer coated with fluorine resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56127449A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0550906U (en) * | 1991-12-05 | 1993-07-02 | 日新電機株式会社 | Switch gear |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2116215B (en) * | 1982-03-06 | 1985-09-25 | Rolls Royce | Improvements in or relating to flame sprayed coatings |
| CA2241421A1 (en) * | 1995-12-29 | 1997-07-10 | Illinois Tool Works Inc. | Coating for cooking vessel |
| JPH09235662A (en) * | 1996-02-28 | 1997-09-09 | Nittetsu Hard Kk | Formation of thermally sprayed coating |
| JP4732765B2 (en) * | 2005-01-28 | 2011-07-27 | 株式会社ネオス | Surface treatment method for thin film manufacturing apparatus member and thin film manufacturing apparatus member |
| JP6192614B2 (en) * | 2014-07-25 | 2017-09-06 | バンドー化学株式会社 | Belt transmission system |
-
1980
- 1980-03-11 JP JP3119380A patent/JPS56127449A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0550906U (en) * | 1991-12-05 | 1993-07-02 | 日新電機株式会社 | Switch gear |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56127449A (en) | 1981-10-06 |
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