JPH0280242A - Heat-resistant and corrosion-resistant multi-layer coated steel tube - Google Patents
Heat-resistant and corrosion-resistant multi-layer coated steel tubeInfo
- Publication number
- JPH0280242A JPH0280242A JP63233152A JP23315288A JPH0280242A JP H0280242 A JPH0280242 A JP H0280242A JP 63233152 A JP63233152 A JP 63233152A JP 23315288 A JP23315288 A JP 23315288A JP H0280242 A JPH0280242 A JP H0280242A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- film
- resistant
- steel pipe
- plating layer
- 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.)
- Granted
Links
- 238000005260 corrosion Methods 0.000 title claims abstract description 25
- 230000007797 corrosion Effects 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 title claims description 40
- 239000010959 steel Substances 0.000 title claims description 40
- 239000000956 alloy Substances 0.000 claims abstract description 27
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 27
- 229910007567 Zn-Ni Inorganic materials 0.000 claims abstract description 25
- 229910007614 Zn—Ni Inorganic materials 0.000 claims abstract description 25
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229920002620 polyvinyl fluoride Polymers 0.000 claims abstract description 16
- 239000003822 epoxy resin Substances 0.000 claims abstract description 13
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 13
- 238000007747 plating Methods 0.000 claims description 45
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 73
- 239000010949 copper Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 239000011241 protective layer Substances 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 abstract description 3
- 238000009835 boiling Methods 0.000 abstract description 2
- 238000009713 electroplating Methods 0.000 abstract description 2
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 abstract description 2
- -1 for instance Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 12
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 6
- 229910000990 Ni alloy Inorganic materials 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 3
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 235000019253 formic acid Nutrition 0.000 description 3
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- CMMUKUYEPRGBFB-UHFFFAOYSA-L dichromic acid Chemical compound O[Cr](=O)(=O)O[Cr](O)(=O)=O CMMUKUYEPRGBFB-UHFFFAOYSA-L 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- JWBZBIUNRGOCGQ-UHFFFAOYSA-N ethene;phthalic acid Chemical compound C=C.C=C.OC(=O)C1=CC=CC=C1C(O)=O JWBZBIUNRGOCGQ-UHFFFAOYSA-N 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007962 solid dispersion Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、自動車あるいはその他の各種機械装置に流体
の移送路として配設される外径が２０ｍｍ程度以下の比
較的小径の配管であって、とくに、苛酷な腐食環境に耐
え得る保護層を有する耐熱耐食重層被覆鋼管に関するも
のである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a relatively small-diameter pipe with an outer diameter of about 20 mm or less, which is installed as a fluid transfer path in an automobile or other various mechanical devices. In particular, the present invention relates to heat-resistant and corrosion-resistant multi-layer coated steel pipes having a protective layer that can withstand severe corrosive environments.
［従来の技術］
従来、自動車その他の機械装置に使用される配管として
は、鋼管の外表面に、Ｚｎめつき層を形成し、このｌｎ
めつき層にクロメート処理を施した製品が多用されてい
る。[Prior Art] Conventionally, as piping used in automobiles and other mechanical devices, a Zn plating layer is formed on the outer surface of a steel pipe, and this ln-plated layer is formed on the outer surface of a steel pipe.
Products with chromate treatment applied to the plating layer are often used.
しかるに、たとえば自動車の制動用あるいは燃料用の配
管は、その使用条件が厳しく、より高度な耐食性は勿論
、エンジン周りなどの高温環境下では耐熱性を、又、外
傷を受は易い床下配管には、耐スクラッチ性、耐衝撃性
などの機械的外力に耐え得るものが要望されており、こ
のような要望に対して、Ｚｎめっき層上へさらにプラス
チックの保護被覆を施したものが使用されるようになっ
てきており、特公昭５７−６０４３４号、特公昭６１−
２３２７１号に、金属物体の表面に電解法によってＺｎ
めつきを施し、次に、このＺｎ層にギ酸を含むクロム酸
液を使用して比較的厚い特殊なりロメート皮膜を形成し
、このクロメート皮膜上にフッ素化樹脂の皮膜を形成す
る方法が提案されている。However, for example, braking or fuel piping in automobiles has severe usage conditions, and of course requires higher corrosion resistance, but also heat resistance in high-temperature environments such as around the engine, and under-floor piping, which is easily damaged. There are demands for products that can withstand mechanical external forces such as scratch resistance and impact resistance.In response to these demands, products with a protective plastic coating on the Zn plating layer are being used. Special Publication No. 57-60434, Special Publication No. 61-
No. 23271, Zn is applied to the surface of a metal object by an electrolytic method.
A method has been proposed in which a relatively thick special chromate film is formed on the Zn layer using a chromate solution containing formic acid after plating, and a fluorinated resin film is formed on this chromate film. ing.
［発明か解決しようとする課題］
しかしながら、前記の方法で形成される保護層は、金属
めっき層の耐食性を増すために、Ｚｎめっき層を２５μ
ｍ以上のように厚く形成する必要があり、そのために生
産性を大きく低下させるという問題があり、又、フッ素
化樹脂との密接な結合を図るためにギ酸を含む比較的高
濃度のクロム酸溶液を使用してクロメート皮膜を形成す
る必要があり、処理液の薬品消耗量が多く、かつ、有害
物質である６価クロムを含む老廃液の処理費か嵩むなど
といった問題もあった。[Problem to be solved by the invention] However, in order to increase the corrosion resistance of the metal plating layer, the protective layer formed by the above method has a Zn plating layer with a thickness of 25 μm.
It is necessary to form the film as thick as 5 m or more, which causes a problem of greatly reducing productivity.Also, in order to achieve a close bond with the fluorinated resin, a relatively high concentration chromic acid solution containing formic acid is required. It is necessary to form a chromate film using chromate, which requires a large amount of chemical consumption in the processing solution, and there are also problems such as an increase in the cost of processing waste solution containing hexavalent chromium, which is a harmful substance.
本発明は、前記問題を解決し、鋼管表面に施す金属めっ
き層と１Ｍ脂脂膜膜を重ね合わせてなる耐食性保護皮膜
における金属めっき層の耐熱耐食性能の向上を図り、こ
の金属めっき層に樹脂皮膜を密着性よく形成せしめて、
機械的外力を含む苛酷な腐食環境下において、耐久性が
ある耐熱耐食性重層被覆鋼管を得ることを目的とするも
のである。The present invention solves the above problems and aims to improve the heat and corrosion resistance performance of the metal plating layer in a corrosion-resistant protective coating formed by superimposing a metal plating layer on the surface of a steel pipe and a 1M fat film. By forming a film with good adhesion,
The objective is to obtain a heat-resistant and corrosion-resistant multi-layer coated steel pipe that is durable under severe corrosive environments including external mechanical forces.
［課題を解決するための手段］
本発明者は、前記問題を解決し、前記目的を達成するた
めに研究を重ねた結果、金属めっき層上にフッ素化樹脂
皮膜を形成するに際して、エポキシ樹脂を中間層として
介在させた重層被覆とすることによって目的を達し得る
ことを見出して本発明を完成するに至った。すなわち、
本発明の第１の実施態様は、鋼管と、該鋼管の外表面に
被着したＺｎ−Ｎｉ合金めっき層と、該Ｚｎ−Ｎｉ合金
めつき層上にエポキシ系樹脂を中間層として介在させて
形成したポリフッ化ビニル皮膜とからなる耐熱耐食性重
層被覆鋼管であり、第２の実施態様は、鋼管と、該鋼管
の外表面に被着したＺｎ−Ｎｉ合金めつき層と、該Ｚｎ
−Ｎｉ合金めっき層上に形成したクロメート皮膜と、該
クロメート皮膜上にエポキシ系樹脂を中間層として介在
させて形成したポリフッ化ビニル皮膜とからなる耐熱耐
食重層被覆鋼管である。[Means for Solving the Problems] As a result of repeated research in order to solve the above-mentioned problems and achieve the above-mentioned objects, the present inventors have discovered that when forming a fluorinated resin film on a metal plating layer, an epoxy resin is used. The present invention was completed based on the discovery that the object could be achieved by forming a multilayer coating with an intervening intermediate layer. That is,
A first embodiment of the present invention comprises a steel pipe, a Zn-Ni alloy plating layer deposited on the outer surface of the steel pipe, and an epoxy resin interposed as an intermediate layer on the Zn-Ni alloy plating layer. The second embodiment is a heat-resistant and corrosion-resistant multilayer coated steel pipe comprising a formed polyvinyl fluoride film, and the second embodiment is a steel pipe, a Zn-Ni alloy plating layer deposited on the outer surface of the steel pipe, and a Zn-Ni alloy plating layer coated on the outer surface of the steel pipe.
This is a heat-resistant and corrosion-resistant multilayer coated steel pipe consisting of a chromate film formed on a -Ni alloy plating layer and a polyvinyl fluoride film formed on the chromate film with an epoxy resin interposed as an intermediate layer.
次に、本発明を添付の図面に基づいて説明する。Next, the present invention will be explained based on the accompanying drawings.
第１図は、本発明の耐熱耐食性重層被覆鋼管の一実施例
を拡大して示す一部分の直径方向の断面図、第２図は、
本発明の別の実施例を拡大して示す直径方向の断面図で
ある。FIG. 1 is a diametrical cross-sectional view of a portion of an enlarged example of the heat-resistant and corrosion-resistant multi-layer coated steel pipe of the present invention, and FIG.
FIG. 3 is an enlarged diametrical cross-sectional view of another embodiment of the invention.
１は、鋼管であって、たとえば材質５ＴＰＧからなり、
管外径２０ｍｍ以下、肉厚０．５〜１ｍｍの電縫鋼管（
第１図）、又は、あらかじめ帯鋼板の表面に施しなＣＵ
めっき層により、二重巻きして重ね合わせ面をろう溶着
して形成し、その外周面にも３μｍ程度のＣｕめっき層
２を有する二重巻鋼管（第２図）である。３は、Ｚｎ−
Ｎｉ合金めっき層であって、鋼管の外表面に、たとえは
、公知の塩化浴又は硫酸浴を使用する電気めっき法によ
って形成され、Ｎｉの含有率は、５〜２０％で層厚１５
μｍ程度以下とすることが耐食性と後加工性の点から好
ましい。４は、クロメート皮膜であって、低濃度のクロ
ム酸又は重クロム酸に硫酸を加えた処理液、あるいは、
市販のＺｎ−Ｎｉめっき用のクロメート処理液によって
、Ｚｎ−Ｎｉ合金めっき層３上に形成され、きわめて効
果的に耐食性を向上させ得るものである。しかしながら
、このクロメート皮膜を形成せずに、Ｚｎ−Ｎｉ合金め
っき層上に、直接、後述の中間層となる樹脂皮膜を被着
させることでもよい。５は、エポキシ系樹脂の中間層で
あって、クロメ−１ご皮膜４上（第１図）又はＺｎ−Ｎ
ｉ合金めっき３層上に直接被着され（第２図）るもので
あって、たとえばエポキシ樹脂を基材としたプライマを
使用して、浸漬又は噴霧なとによって塗布し、加熱乾燥
して３〜１０μｍ程度の厚さに形成される。この中間層
５は、下層のＺｎ−Ｎｉ合金めつき層３又はその上に形
成したクロメート皮ＷＡ４と、最上層のポリフッ化ビニ
ル皮膜との間に介在して両層を強力に接着させ得るもの
である。６は、フッ化ビニル皮膜であって、高沸点溶剤
たとえばジメチル又はジエチレンフタレート中にポリフ
ッ化ビニルの固体か認められない状態に分散された液を
使用して、浸漬又は噴霧によって塗布した後、３５０℃
程度まで加熱乾燥して固定して１０〜２５μｍ程度の厚
さに形成される。1 is a steel pipe made of, for example, 5TPG;
ERW steel pipes with an outer diameter of 20 mm or less and a wall thickness of 0.5 to 1 mm (
(Fig. 1), or CU applied to the surface of the steel strip in advance.
It is a double-wound steel pipe (Fig. 2) that is formed by double-wound plating layers and braze welding the overlapped surfaces, and also has a Cu plating layer 2 of about 3 μm on its outer peripheral surface. 3 is Zn-
The Ni alloy plating layer is formed on the outer surface of the steel pipe by, for example, an electroplating method using a known chloride bath or sulfuric acid bath, and the Ni content is 5 to 20% and the layer thickness is 15%.
It is preferable to set the thickness to about μm or less from the viewpoint of corrosion resistance and post-processability. 4 is a chromate film, which is treated with a treatment solution in which sulfuric acid is added to low concentration chromic acid or dichromic acid, or
It is formed on the Zn-Ni alloy plating layer 3 using a commercially available chromate treatment solution for Zn-Ni plating, and can improve corrosion resistance very effectively. However, without forming this chromate film, it is also possible to directly deposit a resin film that will become an intermediate layer, which will be described later, on the Zn-Ni alloy plating layer. 5 is an intermediate layer of epoxy resin, which is formed on the chrome-1 film 4 (Fig. 1) or on the Zn-N
It is directly deposited on the three layers of i-alloy plating (Fig. 2), and is applied by dipping or spraying using, for example, an epoxy resin-based primer, followed by heating and drying. It is formed to a thickness of about 10 μm. This intermediate layer 5 is interposed between the lower Zn-Ni alloy plating layer 3 or the chromate coating WA4 formed thereon and the uppermost polyvinyl fluoride coating, and is capable of strongly adhering both layers. It is. No. 6 is a vinyl fluoride film which is coated by dipping or spraying using a solid dispersion of polyvinyl fluoride in a high-boiling solvent such as dimethyl or diethylene phthalate, and then coated with 350 ℃
The film is fixed by heating and drying to a thickness of about 10 to 25 μm.
本発明の耐熱耐食性重層被覆鋼管はこのように構成され
ているので、Ｚｎ−Ｎｉ合金めっき層が、従来のＺｎめ
っき層に比較して薄い層厚でより優れた耐食性と、高温
環境下においても劣化しない耐熱耐食性を有すこととな
り、さらに、エポキシ系樹脂を中間層としたので機械的
に強靭で耐熱温度が高く耐候性耐薬品性に優れたポリフ
ッ化ビニル樹脂を接着力よく被着させ、耐スクラッチ性
、耐衝撃性に優れ、苛酷な腐食環境下での保護層として
、きわめて優れた性能を発揮することになるものである
。Since the heat-resistant and corrosion-resistant multi-layer coated steel pipe of the present invention is constructed in this way, the Zn-Ni alloy plating layer has a thinner layer thickness than the conventional Zn plating layer and has better corrosion resistance even in high-temperature environments. It has heat and corrosion resistance that does not deteriorate, and since the epoxy resin is used as an intermediate layer, it can be coated with polyvinyl fluoride resin, which is mechanically strong, has high heat resistance, and has excellent weather and chemical resistance, with good adhesion. It has excellent scratch resistance and impact resistance, and exhibits extremely excellent performance as a protective layer in harsh corrosive environments.
［実施例］ 次に、本発明の実施例を述べる。[Example] Next, examples of the present invention will be described.
実施例 １
１）鋼管ａ
材質５ＰＣＣ１表裏両面に層厚３μｍの銅めっき層を有
する帯鋼板を使用して、外径８ｍｍ、肉厚０．７ｍｍ、
長さ３３０ｍｍの二重巻網管とした。Example 1 1) Steel pipe a Material: 5PCC1 A steel band plate having a copper plating layer with a thickness of 3 μm on both the front and back sides was used, and the outer diameter was 8 mm, the wall thickness was 0.7 mm,
It was made into a double wound mesh pipe with a length of 330 mm.
２）Ｚｎ−Ｎｉ合金めつき層の形成
塩化浴からなる１ｎ−Ｎｉ合金めっき浴（荏原コージラ
イト製Ｚｎ−１０）１υ）を用いて、層厚８μｍの合金
めっき層を形成した。2) Formation of Zn-Ni alloy plating layer An alloy plating layer with a layer thickness of 8 μm was formed using a 1n-Ni alloy plating bath (Zn-10 manufactured by Ebara Cordierite Co., Ltd., 1υ) consisting of a chloride bath.
３）樹脂皮膜の形成
２）で得なＺｎ−Ｎｉ合金めっき層を形成した鋼管ａを
、エポキシ樹脂と顔料とを溶剤によって調整した塗料中
に浸漬して塗布し３５０℃で６０秒間加熱処理して、膜
厚的５μｍのエポキシ樹脂の中間層を形成し、ついで、
ジエチルフタレートにポリフッ化ビニルを分散させた液
に浸漬してポリフッ化ビニルを塗布し、３５０℃で６０
秒間加熱乾燥して、膜厚的１５μｍのポリフッ化ビニル
皮膜を形成した。3) Formation of resin film The steel pipe a on which the excellent Zn-Ni alloy plating layer was formed in 2) was coated by dipping it into a paint prepared by adjusting an epoxy resin and a pigment with a solvent, and then heat-treated at 350°C for 60 seconds. Then, an intermediate layer of epoxy resin with a film thickness of 5 μm was formed, and then,
Polyvinyl fluoride was applied by dipping it in a solution in which polyvinyl fluoride was dispersed in diethyl phthalate, and then heated at 350°C for 60°C.
It was dried by heating for a second to form a polyvinyl fluoride film having a thickness of 15 μm.
４）耐熱耐食性試験
前記のようにして得な重層被覆鋼管の一端側を２５Ｒで
１８０°曲げ加工してステッキ状とし、加熱雰囲気１５
０℃の温度で２４時間連続加熱した後、大気中にて放冷
し、ＪＩＳ ２２３７１に基づく塩水噴霧試験を１４０
時間行なうことを１サイクルとして繰返し行ない、赤錆
発生までのサイクル数を測定して耐熱耐食性を求めた。4) Heat and Corrosion Resistance Test One end of the multilayer coated steel pipe obtained as described above was bent 180° at 25R to form a stick shape, and heated in a heating atmosphere of 15°.
After continuously heating at a temperature of 0°C for 24 hours, it was left to cool in the atmosphere, and a salt spray test based on JIS 22371 was carried out at 140°C.
The heat and corrosion resistance was determined by repeating the test for a certain period of time and measuring the number of cycles until red rust appeared.
５）耐衝撃耐食性試験
一端側を２５Ｒで１８０°曲げ加工してステッキ状とし
た試料に、粒径９〜１５ｍｍの砂利を空気圧力５Ｋ（］
で噴射吹付けを行なった後、ＪＩＳ Ｚ ２３７１に基
づく塩水噴霧試験を１４０時間行なうことを１サイクル
として繰返し行ない、赤錆発生までのサイクル数を測定
して耐衝撃耐食性を求めた。４）、５）の結果を次表に
示す。5) Impact resistance and corrosion resistance test Gravel with a grain size of 9 to 15 mm was placed at an air pressure of 5K (] on a stick-shaped sample with one end bent 180° at 25R).
After spraying, a salt spray test based on JIS Z 2371 was repeated for 140 hours as one cycle, and the number of cycles until red rust appeared was measured to determine impact resistance and corrosion resistance. The results of 4) and 5) are shown in the following table.
実施例 ２
１） ４３ｍ管す
材質５ＴＰＧ ３８ 、外径８ｍｍ、肉厚０．７ｎｗｎ
、長さ３３０ ｍｍの電縫鋼管。Example 2 1) 43m pipe material 5TPG 38mm, outer diameter 8mm, wall thickness 0.7nwn
, 330 mm long electric resistance welded steel pipe.
２）Ｚｎ−Ｎｉ合金めっき層の形成、樹脂皮膜の形成は
、実施例１と同様にして行ない、実施例１と同様にして
諸試験を行なった。結果は、次表に示す。2) Formation of the Zn-Ni alloy plating layer and formation of the resin film were performed in the same manner as in Example 1, and various tests were conducted in the same manner as in Example 1. The results are shown in the table below.
実施例 ３
１）Ｚｎ−Ｎｉ合金めっき層の形成およびクロメート処
ｆ里
鋼管ａを使用して、実施例１と同様にして、Ｚｎ−Ｎｉ
合金めっき層を形成した後、クロメート処理液（荏原コ
ージライト製ＺＮ−８０Ｙ）１１ ）中に浸漬処理して
クロメ−１〜皮膜を形成した。Example 3 1) Formation of Zn-Ni alloy plating layer and chromate treatment Using the steel pipe a, Zn-Ni alloy plating layer was formed in the same manner as in Example 1.
After forming the alloy plating layer, it was immersed in a chromate treatment solution (ZN-80Y manufactured by Ebara Cordierite Co., Ltd. 11) to form a chromate-1 film.
２）以後、実施例１と同様にして樹脂皮膜を形成し、実
施例１と同様にして諸試験を行なった。2) Thereafter, a resin film was formed in the same manner as in Example 1, and various tests were conducted in the same manner as in Example 1.
結果を次表に示す。The results are shown in the table below.
実施例 ４
鋼管すを使用した以外は、実施例３と同様にして、Ｚｎ
−Ｎｉ合金めっき層−クロメート皮膜−エポキシ樹脂の
中間層−ポリフッ化ビニル皮膜からなる重層被覆鋼管を
製作し、実施例１と同様にして諸試験を行なった。結果
を次表に示す。Example 4 Zn was produced in the same manner as in Example 3 except that steel pipes were used.
A multi-layer coated steel pipe consisting of - Ni alloy plating layer - chromate film - epoxy resin intermediate layer - polyvinyl fluoride film was produced, and various tests were conducted in the same manner as in Example 1. The results are shown in the table below.
比較例 １
鋼管ａを使用して、従来の条件で層厚２５μｍのｌｎめ
っき層を形成した後、市販のＺｎめっき用クロメート処
理液によりクロメート処理を行なった。Comparative Example 1 After forming an ln plating layer with a thickness of 25 μm using steel pipe a under conventional conditions, chromate treatment was performed using a commercially available chromate treatment solution for Zn plating.
得られた製品について、実施例１と同様にして諸試験を
行なった。結果を次表に示す。Various tests were conducted on the obtained product in the same manner as in Example 1. The results are shown in the table below.
比較例 ２
鋼管すを使用した以外は、比較例１と同様にして製品を
得、実施例１と同様にして諸試験を行なった。結果を次
表に示す。Comparative Example 2 A product was obtained in the same manner as in Comparative Example 1, except that steel pipes were used, and various tests were conducted in the same manner as in Example 1. The results are shown in the table below.
比較例 ３
鋼管ａを使用して、比較例１と同様にして、Ｚｎめっき
層を形成し、蟻酸を含むｐＨ２，１〜２．６のりロム酸
溶液によりクロメート皮膜を形成させた後、ジエチルフ
タレートにポリフッ化ビニルを分散させた液に浸漬して
ポリフッ化ビニルを塗布し、３５０’Ｃで６０秒間加熱
乾燥して膜厚的１５μｍのポリフッ化ビニル皮膜を形成
し製品とした。得られた製品について、実施例１と同様
にして諸試験を行なった。結果を次表に示す。Comparative Example 3 Using steel pipe a, a Zn plating layer was formed in the same manner as in Comparative Example 1, and a chromate film was formed with a chromic acid solution containing formic acid at a pH of 2.1 to 2.6, followed by diethyl phthalate. The product was coated with polyvinyl fluoride by immersing it in a solution in which polyvinyl fluoride was dispersed, and then dried by heating at 350'C for 60 seconds to form a polyvinyl fluoride film with a thickness of 15 μm. Various tests were conducted on the obtained product in the same manner as in Example 1. The results are shown in the table below.
比較例 ４
鋼管すを使用した以外は、比較例３と同様にして製品を
得、実施例１と同様にして諸試験を行なった。結果を次
表に示す。Comparative Example 4 A product was obtained in the same manner as in Comparative Example 3, except that steel pipes were used, and various tests were conducted in the same manner as in Example 1. The results are shown in the table below.
［発明の効果］
本発明は、Ｚｎ−Ｎｉ合金めっき層上に樹脂中間層を介
してフッ素化樹脂皮膜を形成させたものであるから、ク
ロメート処理の有無にかかわらす、従来のＺｎめっきに
比較して耐熱性に優れ、全体の層厚を薄くしても同等以
上の耐食性を有し、樹脂皮膜を密着性よく形成し得、製
造コストの低減を図り得、機械的外力を含む厳しい腐食
環境下で使用される配管用としてきわめて有用であるな
どきわめて優れた効果が認められるものである。[Effects of the Invention] Since the present invention forms a fluorinated resin film on a Zn-Ni alloy plating layer via a resin intermediate layer, it is superior to conventional Zn plating with or without chromate treatment. It has excellent heat resistance, has the same or higher corrosion resistance even when the overall layer thickness is thinner, can form a resin film with good adhesion, can reduce manufacturing costs, and can withstand severe corrosive environments including external mechanical forces. It has been recognized to have extremely excellent effects, such as being extremely useful for piping used below.
第１図は、本発明の耐熱耐食性重層被覆鋼管の一実施例
を拡大して一部分を示す直径方向の断面図、第２図は、
本発明の別の実施例を拡大して示す直径方向の断面図で
ある。
１・・・鋼管、２・・・Ｃｕめつき層、３・・・１ｎ−
Ｎｉ合金めっき層、４・・・クロメート皮膜、５・・・
中間層、６・・・ポリフッ化ビニル皮膜
特許出願人 臼井国際産業株式会社FIG. 1 is an enlarged diametrical cross-sectional view showing a portion of an embodiment of the heat-resistant and corrosion-resistant multilayer coated steel pipe of the present invention, and FIG.
FIG. 3 is an enlarged diametrical cross-sectional view of another embodiment of the invention. 1... Steel pipe, 2... Cu plating layer, 3... 1n-
Ni alloy plating layer, 4... chromate film, 5...
Intermediate layer, 6... Polyvinyl fluoride film Patent applicant Usui Kokusai Sangyo Co., Ltd.
Claims (1)
めっき層と、該Ｚｎ−Ｎｉ合金めっき層上にエポキシ系
樹脂を中間層として介在させて形成したポリフッ化ビニ
ル皮膜とからなることを特徴とする耐熱耐食性重層被覆
鋼管。 ２）鋼管と、該鋼管の外表面に被着したＺｎ−Ｎｉ合金
めっき層と、該Ｚｎ−Ｎｉ合金めっき層上に形成したク
ロメート皮膜と、該クロメート皮膜上にエポキシ系樹脂
を中間層として介在させて形成したポリフッ化ビニル皮
膜とからなることを特徴とする耐熱耐食性重層被覆鋼管
。[Scope of Claims] 1) A steel pipe, a Zn-Ni alloy plating layer deposited on the outer surface of the steel pipe, and a polyfluoride film formed by interposing an epoxy resin as an intermediate layer on the Zn-Ni alloy plating layer. A heat-resistant and corrosion-resistant multilayer coated steel pipe characterized by comprising a vinyl chloride film. 2) A steel pipe, a Zn-Ni alloy plating layer deposited on the outer surface of the steel pipe, a chromate film formed on the Zn-Ni alloy plating layer, and an epoxy resin interposed as an intermediate layer on the chromate film. A heat-resistant and corrosion-resistant multilayer coated steel pipe comprising a polyvinyl fluoride film formed by
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23315288A JP2639979B2 (en) | 1988-09-17 | 1988-09-17 | Heat resistant and corrosion resistant multi-layer coated steel pipe |
| GB8920962A GB2222785B (en) | 1988-09-17 | 1989-09-15 | Multi-layered pipe coating |
| DE3931046A DE3931046A1 (en) | 1988-09-17 | 1989-09-16 | HEAT AND CORROSION RESISTANT MULTIPLE COATED STEEL TUBE |
| KR1019890013453A KR920009633B1 (en) | 1988-09-17 | 1989-09-18 | Heat and corrosion resistant steel pipe with multilayer coating |
| US09/847,316 US6397896B2 (en) | 1988-09-17 | 2001-05-03 | Heat and corrosion resistant steel pipe having multi-layered coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23315288A JP2639979B2 (en) | 1988-09-17 | 1988-09-17 | Heat resistant and corrosion resistant multi-layer coated steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0280242A true JPH0280242A (en) | 1990-03-20 |
| JP2639979B2 JP2639979B2 (en) | 1997-08-13 |
Family
ID=16950533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23315288A Expired - Fee Related JP2639979B2 (en) | 1988-09-17 | 1988-09-17 | Heat resistant and corrosion resistant multi-layer coated steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2639979B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09308851A (en) * | 1996-05-20 | 1997-12-02 | Iris Ohyama Inc | Resin-coated pipe and adhesive applicator |
| US6500565B2 (en) * | 1994-08-30 | 2002-12-31 | Usui Kokusai Sangyo Kaisha Limited | Corrosion resistant resin coating structure in a metal tube |
| JP2019181358A (en) * | 2018-04-08 | 2019-10-24 | Ａｃａ株式会社 | Coating film producing method and coating film structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162025A (en) * | 2013-02-21 | 2013-06-19 | 江苏宏宝集团有限公司 | Composite stainless steel pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6123272B2 (en) | 2012-03-30 | 2017-05-10 | 株式会社ジェイ・エム・エス | In-circuit pressure measurement sensor unit and in-circuit pressure measurement diaphragm |
-
1988
- 1988-09-17 JP JP23315288A patent/JP2639979B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6500565B2 (en) * | 1994-08-30 | 2002-12-31 | Usui Kokusai Sangyo Kaisha Limited | Corrosion resistant resin coating structure in a metal tube |
| JPH09308851A (en) * | 1996-05-20 | 1997-12-02 | Iris Ohyama Inc | Resin-coated pipe and adhesive applicator |
| JP2019181358A (en) * | 2018-04-08 | 2019-10-24 | Ａｃａ株式会社 | Coating film producing method and coating film structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2639979B2 (en) | 1997-08-13 |
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