JP7629161B2 - Corrosion and mold resistant metal plate - Google Patents
Corrosion and mold resistant metal plate Download PDFInfo
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- JP7629161B2 JP7629161B2 JP2021089579A JP2021089579A JP7629161B2 JP 7629161 B2 JP7629161 B2 JP 7629161B2 JP 2021089579 A JP2021089579 A JP 2021089579A JP 2021089579 A JP2021089579 A JP 2021089579A JP 7629161 B2 JP7629161 B2 JP 7629161B2
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- 230000007797 corrosion Effects 0.000 title claims description 30
- 238000005260 corrosion Methods 0.000 title claims description 30
- 229910052751 metal Inorganic materials 0.000 title claims description 19
- 239000002184 metal Substances 0.000 title claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 38
- 229910052742 iron Inorganic materials 0.000 claims description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 18
- 239000010949 copper Substances 0.000 claims description 18
- 238000007747 plating Methods 0.000 claims description 16
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- IYRDVAUFQZOLSB-UHFFFAOYSA-N copper iron Chemical compound [Fe].[Cu] IYRDVAUFQZOLSB-UHFFFAOYSA-N 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 241000233866 Fungi Species 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 230000000843 anti-fungal effect Effects 0.000 description 8
- 230000000844 anti-bacterial effect Effects 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000003242 anti bacterial agent Substances 0.000 description 4
- 239000003429 antifungal agent Substances 0.000 description 4
- 229940121375 antifungal agent Drugs 0.000 description 4
- 230000000855 fungicidal effect Effects 0.000 description 4
- 239000000417 fungicide Substances 0.000 description 4
- 238000011534 incubation Methods 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 239000003973 paint Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
- Laminated Bodies (AREA)
- Electroplating Methods And Accessories (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Description
本発明は、耐食性を有するとともに、表面においてカビの発生を防止する機能を備えた耐食防カビ性金属板に関するものである。 The present invention relates to a corrosion-resistant and mold-resistant metal plate that is corrosion-resistant and has the function of preventing mold growth on its surface.
洗濯機の構成要素である洗濯槽は、使用時には洗剤や漂白剤等の薬剤が混入した水の中に浸漬され、また、未使用時であっても湿度の高い環境に置かれるため、高い耐食性が求められる。そこで、洗濯槽は、耐食性に優れたステンレス鋼で作られている。例えば、特開平８－１３４５９９号公報には洗濯槽用ステンレス鋼が、特開２０１８－１２６３５０公報には、ステンレス鋼材で有底円筒状に形成された洗濯槽が開示されている。 The washing tub, which is a component of a washing machine, is immersed in water containing chemicals such as detergent and bleach when in use, and is also placed in a humid environment even when not in use, so it is required to have high corrosion resistance. For this reason, washing tubs are made of stainless steel, which has excellent corrosion resistance. For example, JP 8-134599 A discloses stainless steel for washing tubs, and JP 2018-126350 A discloses a washing tub made of stainless steel and formed into a cylindrical shape with a bottom.
ところが、ステンレス鋼で作られた洗濯槽には、カビが発生する問題がある。また、湿度の高い環境に置かれる物品は、洗濯槽と同様に、カビ発生の問題を抱えている。そこで、そのような物品を形成する材料に、カビの発生を防止する機能を備えることが提案されている。 However, washing machine tubs made of stainless steel have the problem of mold growth. Also, items that are placed in high humidity environments have the same problem of mold growth as washing machine tubs. Therefore, it has been proposed to provide the materials used to make such items with a function to prevent mold growth.
例えば、特開平１０－３４８１５号公報には、熱硬化型塗料に抗菌、防カビ剤を添加して、最表層に塗装、焼き付け硬化させた塗装金属板において、抗菌、防カビ剤を樹脂担体表面に担持させることが提案されている。 For example, Japanese Patent Application Laid-Open No. 10-34815 proposes adding an antibacterial and antifungal agent to a thermosetting paint, applying it to the outermost layer of a coated metal plate, and baking and curing it, so that the antibacterial and antifungal agent is supported on the surface of a resin carrier.
しかしながら、防カビ性を備える従来の塗装金属板は、最表層において抗菌、防カビ剤が樹脂に担持される構造となっているため、液体や気体の流れに晒されるような、表面に摩擦が生じる環境に置かれた場合、抗菌、防カビ剤が剥離し、カビの発生を防止する機能が低下するおそれがある。 However, conventional painted metal sheets with anti-fungal properties have a structure in which the anti-bacterial and anti-fungal agents are supported by resin in the outermost layer. Therefore, if the sheet is placed in an environment where friction occurs on the surface, such as being exposed to the flow of liquid or gas, the anti-bacterial and anti-fungal agents may peel off, reducing the ability to prevent mold growth.
そこで、本発明は、耐食性を有するとともに、表面に摩擦が生じる環境に置かれた場合でもカビの発生の防止に必要な機能を維持する耐食抗カビ性金属板を提供することを目的とする。 Therefore, the present invention aims to provide a corrosion-resistant and mold-resistant metal plate that is corrosion-resistant and maintains the functionality required to prevent mold growth even when placed in an environment where friction occurs on the surface.
本発明に係る耐食抗カビ性金属板は、銅の比率が鉄の比率より大きく、前記鉄が前記銅により取り囲まれた海島構造を有する銅鉄合金を圧延して得られた板材の表面が、マイクロポーラスメッキで被覆されている。 The corrosion-resistant and fungus-resistant metal plate of the present invention is obtained by rolling a copper-iron alloy having a sea-island structure in which the ratio of copper is greater than the ratio of iron, and the iron is surrounded by the copper, and the surface of the plate is coated with a microporous plating.
なお、本発明において、鉄が銅により取り囲まれた海島構造とは、所謂、鉄が偏析した状態とはなっておらず、鉄が銅に均等に分散した状態であることを意図する。より具体的には、銅により取り囲まれた鉄の大きさが１００ｎｍを超えない状態である。 In the present invention, the sea-island structure in which iron is surrounded by copper means that the iron is not segregated, but is evenly dispersed in the copper. More specifically, it is a state in which the size of the iron surrounded by copper does not exceed 100 nm.
本発明に係る耐食抗カビ性金属板によれば、板材の表面がマイクロポーラスメッキで被覆されているため、耐食性を有するものとなる。また、マイクロポーラスメッキの層厚方向に貫通する微細孔を介し、板材を構成する銅鉄合金の有する抗カビ機能を表面において発現させることができる。しかも、摩擦が生じる環境下に置かれた場合においても、板材を構成する銅鉄合金の有する抗カビ機能は低下することがない。従って、本発明に係る耐食抗カビ性金属板は、耐食性を有するとともに、表面に摩擦が生じる環境に置かれた場合でもカビの発生の防止に必要な機能を維持することができる。 The corrosion-resistant and fungicide-resistant metal plate of the present invention has corrosion resistance because the surface of the plate is coated with a microporous plating. In addition, the anti-fungal function of the copper-iron alloy constituting the plate can be expressed on the surface through the fine holes that penetrate the plate in the thickness direction of the microporous plating. Moreover, even when the plate is placed in an environment where friction occurs, the anti-fungal function of the copper-iron alloy constituting the plate does not decrease. Therefore, the corrosion-resistant and fungicide-resistant metal plate of the present invention has corrosion resistance and can maintain the function necessary to prevent the growth of mold even when the plate is placed in an environment where friction occurs on the surface.
本発明に係る耐食抗カビ性金属板を構成する板材を得るための銅鉄合金は、銅、鉄及び不可避的不純物で構成され、その銅の比率は鉄の比率より大きい。銅の比率を鉄の比率より大きくすることにより、カビの発生を防止するために必要な抗カビ機能を持たせることができる。なお、純銅では、得られる板材の機械的強度が用途によっては不十分なものとなるため、鉄を含む銅鉄合金を用いる。 The copper-iron alloy used to obtain the plate material constituting the corrosion-resistant and fungicide-resistant metal plate of the present invention is composed of copper, iron, and unavoidable impurities, with the copper ratio being greater than the iron ratio. By making the copper ratio greater than the iron ratio, it is possible to provide the anti-fungal function necessary to prevent the growth of fungus. Note that, since the mechanical strength of the obtained plate material obtained with pure copper is insufficient depending on the application, a copper-iron alloy containing iron is used.
更に、銅鉄合金は、鉄が銅により取り囲まれた海島構造を有している。なお、鉄が偏析している状態の銅鉄合金では、用途によって必要とされる厚さに圧延することができず、本発明に係る耐食抗カビ性金属板を構成する板材を得ることはできない。 Furthermore, copper-iron alloys have a sea-island structure in which iron is surrounded by copper. However, copper-iron alloys in which iron is segregated cannot be rolled to the thickness required for a particular application, and it is therefore not possible to obtain the sheet material that constitutes the corrosion-resistant, fungus-resistant metal plate of the present invention.
銅鉄合金の好ましい組成比率は、銅が９４～９６重量％、鉄が４～６重量％である。この組成比率とすることにより、銅鉄合金の有する抗カビ機能を更に高めることができる。 The preferred composition ratio of the copper-iron alloy is 94-96% by weight copper and 4-6% by weight iron. This composition ratio can further enhance the antifungal properties of the copper-iron alloy.
本発明に係る耐食抗カビ性金属板において、銅鉄合金を圧延して得られた板材の表面は、マイクロポーラスメッキで被覆される。マイクロポーラスメッキは、メッキの層厚方向にメッキを貫通する微細孔を有するものである。銅鉄合金の腐食を防止するとともに表面で抗カビ機能を発現させることができる。 In the corrosion-resistant and fungicide-resistant metal plate of the present invention, the surface of the plate material obtained by rolling a copper-iron alloy is coated with a microporous plating. The microporous plating has minute holes that penetrate the plating in the thickness direction of the plating. This prevents corrosion of the copper-iron alloy and also provides anti-fungal properties on the surface.
マイクロポーラスメッキは、公知の手法で形成することができる。銅の比率が鉄の比率より大きい銅鉄合金の耐食性を用途に必要とされる程度に維持できるものであればよいが、ニッケル（Ｎｉ）で形成することが好ましい。なお、ニッケルで形成する場合の膜厚は、１～５μｍが好ましく、２～４μｍが更に好ましい。また、微細孔の数は、１００００～３００００／ｃｍ２が好ましく、１９０００～２１０００／ｃｍ２が更に好ましい。 Microporous plating can be formed by a known method. Any material can be used as long as it can maintain the corrosion resistance of a copper-iron alloy in which the ratio of copper is greater than the ratio of iron to a level required for the application, but it is preferable to form the material using nickel (Ni). When formed using nickel, the film thickness is preferably 1 to 5 μm, more preferably 2 to 4 μm. The number of micropores is preferably 10,000 to 30,000/ cm2 , more preferably 19,000 to 21,000/ cm2 .
マイクロポーラスメッキは、洗濯中の衣類の付属品の衝突など、個体との衝突による損傷が懸念される場合、ニッケルで形成される第一の層と、第一の層の上にクロム（Ｃｒ）で形成される第二の層で構成し、メッキの機械的強度を高めておくことが好ましい。なお、クロムで形成される第二の層の膜厚は、０．１～０．３μｍが好ましい。 When there is concern about damage caused by collision with an individual object, such as the collision of clothing accessories during washing, it is preferable for the microporous plating to be composed of a first layer made of nickel and a second layer made of chromium (Cr) on top of the first layer, thereby increasing the mechanical strength of the plating. The thickness of the second layer made of chromium is preferably 0.1 to 0.3 μm.
本発明に係る耐食抗カビ性金属板は、湿度が高く、表面が液体や気体の流れに晒される環境に置かれる物品の形成に好適である。特に、洗濯槽、或いは、エアコンのフィンの材料として好適である。 The corrosion-resistant and mold-resistant metal plate of the present invention is suitable for forming articles that are placed in humid environments where the surface is exposed to the flow of liquids or gases. It is particularly suitable as a material for washing machine drums or air conditioner fins.
以下の供試体を作成し、耐食性及び抗カビ性の試験を実施した。
＜供試体＞
鉄が銅により取り囲まれた海島構造を有し、銅９５重量％、鉄５重量％の銅鉄合金であるＣＦＡ９５（製品名、ＣＦＡジャパン株式会社）を圧延し、厚み寸法０．２ｍｍの板材を作成した。そして、板材の表面に、マイクロポーラスメッキとしてトップポーラスニッケルＲＳＮ（商品名、奥野製薬工業株式会社）を１０分間施し、耐食抗カビ性金属板を作成した。なお、メッキの組成はＮｉ（ニッケル）１００％である。また、メッキ厚は２～４μｍである。
The following test specimens were prepared and subjected to tests for corrosion resistance and mold resistance.
<Test specimen>
CFA95 (product name, CFA Japan Co., Ltd.), a copper-iron alloy with 95% by weight copper and 5% by weight iron, having an island-in-a-sea structure in which iron is surrounded by copper, was rolled to produce a plate with a thickness of 0.2 mm. Then, Top Porous Nickel RSN (product name, Okuno Chemical Industries Co., Ltd.) was applied as a microporous plating to the surface of the plate for 10 minutes to produce a corrosion-resistant and mold-resistant metal plate. The plating composition was 100% Ni (nickel). The plating thickness was 2 to 4 μm.
＜耐食性試験＞
ＪＩＳＺ２３７１：２０１５「塩水噴霧試験方法」に基づく試験より、耐食性の確認を行った。ただし、噴霧時間は９６時間とした。噴霧後の供試体の外観を図１に示す。僅かな点状の腐食は確認されたもの、大きな腐食は無かった。
<Corrosion resistance test>
Corrosion resistance was confirmed by a test based on JIS Z2371:2015 "Salt Spray Test Method". The spray time was 96 hours. The appearance of the test specimen after spraying is shown in Figure 1. Although slight spot corrosion was confirmed, no major corrosion was observed.
＜抗カビ性試験＞
ＪＩＳＺ２９１１：２０１８「カビ抵抗性試験方法 ８．塗料の試験」により、抗カビ性の確認を行った。なお、培養温度は２６℃、培養時間は７日間とした。培養後の供試体の外観を図２に示す。試験結果は「１：試料又は試験片の接種した部分に認められる菌糸の発育部分の面積は、全面積の１／３を超えない。」であったが、菌糸の発育が認められたのは試験片が培地に接触する部分（試験片の側壁面）のみであり、試験片の表面における菌糸の発育は認められなかった。これに対し、市販の抗菌ステンレスを用いた比較試験の結果は、「２：試料又は試験片の接種した部分に認められる菌糸の発育部分の面積は、全面積の１／３を超える。」であり、試験片の表面全体に菌糸の発育が認められた。
<Anti-fungal test>
The antifungal properties were confirmed by JIS Z2911:2018 "Mold Resistance Test Method 8. Paint Test". The incubation temperature was 26°C, and the incubation time was 7 days. The appearance of the specimen after incubation is shown in Figure 2. The test result was "1: The area of the hyphae growth part observed in the inoculated part of the sample or test piece does not exceed 1/3 of the total area." However, the growth of hyphae was observed only in the part where the test piece contacted the medium (the side wall surface of the test piece), and no growth of hyphae was observed on the surface of the test piece. In contrast, the result of a comparative test using a commercially available antibacterial stainless steel was "2: The area of the hyphae growth part observed in the inoculated part of the sample or test piece exceeds 1/3 of the total area.", and hyphae growth was observed on the entire surface of the test piece.
Claims (6)
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015151559A (en) | 2014-02-12 | 2015-08-24 | 三菱マテリアル株式会社 | Cu-Fe alloy |
| JP2017145210A (en) | 2016-02-16 | 2017-08-24 | 大日本印刷株式会社 | Antibacterial metal article |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06240384A (en) * | 1993-02-19 | 1994-08-30 | Toshiba Corp | Decoration |
| JP3513581B2 (en) * | 1996-06-19 | 2004-03-31 | 株式会社Ｉｎａｘ | Nickel-chromium plating film having antibacterial properties and plating method |
| JP2000061193A (en) * | 1998-08-18 | 2000-02-29 | Nisshin Steel Co Ltd | Washing tank improved in mildewproofing property |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015151559A (en) | 2014-02-12 | 2015-08-24 | 三菱マテリアル株式会社 | Cu-Fe alloy |
| JP2017145210A (en) | 2016-02-16 | 2017-08-24 | 大日本印刷株式会社 | Antibacterial metal article |
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