Corrosion Behavior of Field-Exposed Zinc in a Tropical Marine Atmosphere

被引：56
|
作者：
Cui, Zhongyu [1 ]
Li, Xiaogang [1 ]
Xiao, Kui [1 ]
Dong, Chaofang [1 ]
Liu, Zhiyong [1 ]
Wang, Liwei [2 ]
机构：
[1] Univ Sci & Technol Beijing, Ctr Corros & Protect, Beijing 100083, Peoples R China
[2] Beijing Univ Technol, Sch Mech & Elect Engn, Beijing 100022, Peoples R China
来源：
CORROSION | 2014年 / 70卷 / 07期
基金：
中国国家自然科学基金;
关键词：
atmospheric corrosion; corrosion product; corrosion rate; pitting; zinc; CRITICAL PITTING TEMPERATURE; TENERIFE CANARY-ISLANDS; SUBTROPICAL AREAS; SEAWATER DROPLETS; CARBON-DIOXIDE; METAL-SURFACES; SANTA-CRUZ; PRODUCTS; STEEL; CHLORIDE;
D O I：
10.5006/1177
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Corrosion behavior of zinc exposed to a tropical marine atmosphere for 4 years was investigated. The results showed an obvious decrease in the corrosion rate, which was attributed to the development of the protective corrosion product layer with one element of this structure being simonkolleite (Zn5Cl2[OH](8)center dot H2O). Corrosion of zinc initiated from localized corrosion, which was characterized with some pits, grooves, grain boundaries, and crystallographic features during the initial six exposure months. As the exposure time extended, uniform corrosion occurred and the corrosion products presented a three-layer structure where Zn5Cl2[OH](8)center dot H2O was concentrated close to the bottom, sodium zinc chlorohydroxy-sulfate (NaZn4Cl[OH](6)SO4 center dot 6H(2)O) was enriched in the middle layer, while zinc hydroxycarbonates and zincite (ZnO) covered the surface.
引用
收藏
页码：731 / 748
页数：18
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