鉄と鋼
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
亜鉛系めつき鋼板の塗膜下腐食の支配要因
西村 一実北山 實三吉 康彦
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ジャーナル オープンアクセス

1986 年 72 巻 1 号 p. 101-106

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Corrosion resistance of Zn alloy electroplated steel sheets was investigated using the salt spray test. Unpainted Zn-Ni electroplated steel sheet showed a higher resistance to red rusting than unpainted Zn and Zn-Fe electroplated steel sheets. The corrosion products of Zn-Ni were more stable than those of Zn and Zn-Fe.
The corrosion resistance of painted Zn-Fe and Zn-Ni electroplated steel sheets was affected by the composition and the structure of their electrodeposits. The crystal structure of Zn-Fe electrodeposits changed with the composition of electrodeposits and electroplating conditions such as the kind of electroplating solution and current density. The electrodeposit of the small, granular crystals had better corrosion resistance against blistering than the electrodeposit of the big, dendrite crystals. The difference is considered to come from that between the corrosion resistances against OH-ions formed by the cathodic reaction under the paint film.
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© 一般社団法人 日本鉄鋼協会

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