表面技术2016，Vol.45Issue(3)：152-157,6.DOI:10.16490/j.cnki.issn.1001-3660.2016.03.025
镀锌钢在红沿河大气环境中的腐蚀行为
Atmospheric Corrosion Behavior of Galvanized Steel at Hongyanhe Nuclear Power Station
刘雨薇 1曹公望 1王振尧 1曹岩 2蒋双优 2王磊2
作者信息
- 1. 中国科学院金属研究所，沈阳110016
- 2. 辽宁红沿河核电有限公司，大连116319
- 折叠
摘要
Abstract
ABSTRACT:Objective To study the atmospheric corrosion behavior and mechanism of galvanized steel at Hongyanhe nuclear power station with high SO2 and Cl-concentrations. Methods The galvanized steel was exposed in the Hongyanhe atmospheric envi-ronment for 4, 12,18 and 24 months, according to GB/T 6464—1997. The corrosion products of galvanized steel after explosion were observed and analyzed by corrosion mass loss test, scanning electron microscopy ( SEM ) and X-ray diffraction ( XRD ) . Results The results of corrosion kinetics analysis showed that the galvanized steel corrosion weight loss increased linearly with the increase of the exposure time. XRD analysis results showed that with the extension of exposure time, there was no big change in the composition of corrosion products formed on the surface of the zinc coating, which were mainly Zn12(SO4)3Cl3(OH)15·5H2O and 6Zn(OH)2·ZnSO4·4H2O. SEM results showed that the corrosion products increased gradually with the extension of exposure time, and the product morphology changed slightly, with balls and needles as the main shapes. From the point of cross section analysis, after 18 months, the corrosion products were divided into two layers, while after 24 months, the thickness of the corrosion products increased slightly, and the loose layer was transformed into dense layer. Conclusion For galvanized steel corrosion in the atmosphere of Hongyanhe region, SO2 and Cl- were the main influencing factors of the corrosion process. The corrosion products formed on the surface of galvanized steel had relatively poor protective effect.关键词
大气腐蚀/镀锌钢/红沿河核电站/Cl-/SO2/形貌分析Key words
atmospheric corrosion/galvanized steel/Hongyanhe nuclear power station/Cl-/SO2/morphological analysis分类
矿业与冶金引用本文复制引用
刘雨薇,曹公望,王振尧,曹岩,蒋双优,王磊..镀锌钢在红沿河大气环境中的腐蚀行为[J].表面技术,2016,45(3):152-157,6.
