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Zn composite corrosion resistance coatings: What works and what does not work?
Journal of Loss Prevention in the Process Industries ( IF 3.5 ) Pub Date : 2021-01-07 , DOI: 10.1016/j.jlp.2020.104376
Shams Anwar , Faisal Khan , Yahui Zhang , Susan Caines

Corrosion is one of the most significant contributors to structural degradation in process industries. It causes process equipment failure, which can led to severe safety issues. One approach to address this concern is to provide a preventive barrier-coating to equipment. Due to its superior reductive property, zinc is usually employed as a sacrificial anode in conventional corrosion-resistance methods. Nickel is also used to both mechanically strengthen the barrier and improve overall corrosion resistance; therefore, zinc, zinc-nickel alloys, and zinc-nickel-oxide composite coatings are commonly employed for anti-corrosion purposes. The complexation of zinc and nickel ions by agents (citrate, acetate and EDTA) can stabilize the electrodeposition bath and extend the pH of Ni(OH)2 and ZnO precipitation to improve corrosion resistance in the resultant coating. This paper reviews the challenge with these type of coatings and presents progress in Zn and Zn-Ni composite corrosion resistance coatings co-deposited with Al2O3, TiO2, ZrO2, SiO2, and Fe2O3 as means of corrosion control to reduce the probability of process equipment failure due to corrosion, which will improve the overall safety and reliability of processing equipment.



中文翻译:

锌复合耐腐蚀涂料:什么有效,什么无效?

腐蚀是加工业中结构退化的最重要因素之一。它会导致过程设备故障,从而导致严重的安全问题。解决这一问题的一种方法是为设备提供预防性的隔离涂层。由于其优异的还原性能,锌通常在常规的耐腐蚀方法中用作牺牲阳极。镍还被用来机械地加强阻挡层和改善整体耐蚀性。因此,锌,锌镍合金和锌镍氧化物复合涂层通常用于防腐目的。锌和镍离子与试剂(柠檬酸盐,乙酸盐和EDTA)的络合可以稳定电沉积浴并扩展Ni(OH)2的pHZnO沉淀可改善所得涂层的耐腐蚀性。本文回顾与这些类型涂料和呈现的挑战中的Zn和Zn-Ni复合耐腐蚀涂层进展共沉积有Al 2 ö 3,的TiO 2,的ZrO 2的SiO 2,和Fe 2 ö 3腐蚀的手段控制以减少过程设备由于腐蚀而发生故障的可能性,这将提高过程设备的整体安全性和可靠性。

更新日期:2021-01-07
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