Corrosion behavior of carbon steel coated with a zinc-rich paint containing metallic compounds under wet and dry cyclic conditions,Materials and Corrosion

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Corrosion behavior of carbon steel coated with a zinc-rich paint containing metallic compounds under wet and dry cyclic conditions
Materials and Corrosion ( IF 1.6 ) Pub Date : 2021-07-12 , DOI: 10.1002/maco.202112465
Masamitsu Takahashi _{1,

2} , Hiroshi Deguchi ₃ , Yasunori Hayashi ₄ , Akihiko Kimura ₄ , Koushu Hanaki _{1,

5} , Hiroaki Tsuchiya ₁ , Masato Yamashita _{1,

5} , Shinji Fujimoto ₁

Affiliation

The corrosion behavior of carbon steel coated with a zinc-rich paint containing two metallic compounds, Al₂(SO₄)₃ and CaO, as anticorrosive additives was examined under wet and dry cyclic corrosion test conditions. The zinc-rich paint coating without the two metallic compounds formed a white corrosion product and red iron rust on the surface after the corrosion test, whereas the coating with the metallic compounds showed reduced surface corrosion products. The corrosion current density of the painted steel substrate decreased drastically due to the incorporation of metallic compounds in the paint. The zinc-rich paint coating modified with the metallic compounds contained dispersed simonkolleite (Zn₅(OH)₈Cl₂·H₂O) phase and possibly very fine CaSO₄ particles, which remarkably improved the protectiveness of the zinc-rich paint coating.

中文翻译：

涂有含金属化合物的富锌涂料的碳钢在干湿循环条件下的腐蚀行为

在干湿循环腐蚀试验条件下，研究了涂有含有两种金属化合物 Al ₂ (SO ₄ ) ₃和 CaO 作为防腐添加剂的富锌涂料的碳钢的腐蚀行为。不含两种金属化合物的富锌涂料涂层经腐蚀试验后在表面形成白色腐蚀产物和红色铁锈，而含有金属化合物的涂层表面腐蚀产物减少。由于涂料中金属化合物的加入，涂漆钢基材的腐蚀电流密度急剧下降。用金属化合物改性的富锌涂料涂层含有分散的菱镁矿 (Zn ₅ (OH) ₈ Cl₂ ·H ₂ O) 相和可能非常细的CaSO ₄颗粒，显着提高了富锌涂料涂层的保护性。

更新日期：2021-07-12

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