引用本文:龚沛，曹学军，宁韶奇，朱丽萍.不同环境对AZ61镁合金大气腐蚀的影响[J].中国表面工程,2015,28(5):123~128
GONG Pei, CAO Xuejun, NING Shaoqi, ZHU Liping.Influence of Different Environments on Atmospheric Corrosion of AZ61 Magnesium Alloy[J].China Surface Engineering,2015,28(5):123~128
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不同环境对AZ61镁合金大气腐蚀的影响
龚沛，曹学军，宁韶奇，朱丽萍1,2
1. 内蒙古工业大学 材料科学与工程学院;2. 中国兵器科学研究院宁波分院
摘要:
AZ61镁合金大气腐蚀的评估不但能为材料设计提供依据，还能为实验室大气模拟腐蚀实验提供对比参数。利用XRD、SEM、EDS和XPS研究AZ61镁合金板材在万宁、西双版纳和江津三地挂片（2个月）的腐蚀速度、表面腐蚀形貌及产物构成，结果表明，AZ61镁合金板材在3种气候环境下的腐蚀速度排序为：万宁＞江津＞西双版纳，且近海大气（万宁）的腐蚀速度成倍增加，年腐蚀率达到17 μm/a；AZ61合金在万宁的近海大气环境中形成的表面腐蚀层较厚且疏松，表面龟裂明显，表面腐蚀产物中有来自于含盐大气结晶的氯离子存在；AZ61合金在西双版纳大气中形成的腐蚀产物层较薄；AZ61合金在江津工业大气中的腐蚀产物层的厚度介于西双版纳和万宁之间；表面腐蚀层综合分析表明，万宁挂片中有水合碱式碳酸镁存在。
关键词:  AZ61镁合金  大气腐蚀  环境  评估
DOI：10.11933/j.issn.1007-9289.2015.05.019
分类号:
基金项目:
Influence of Different Environments on Atmospheric Corrosion of AZ61 Magnesium Alloy
GONG Pei, CAO Xuejun, NING Shaoqi, ZHU Liping1,2
1. School of Materials Science and Engineering, Inner Mongolia University of Technology;2. Ningbo Branch of China Academy of Ordnance Science
Abstract:
The assessment of the atmospheric corrosion of AZ61 magnesium alloy can provide not only the basis for the material design, but also the contrast parameter for the laboratory atmosphere simulation experiment. The corrosion rate, surface corrosion morphology and product composition of AZ61 magnesium alloy sheets (2 months) were studied with XRD, EDS, SEM and XPS in Wanning, Xishuangbanna and Jiangjin. The results show that the corrosion rate ranking of AZ61 magnesium alloy sheet under three climate environments is: Wanning>Jiangjin>Xishuangbanna, the corrosion rate of AZ61 magnesium alloy sheet in Wanning sample increases exponentially, and the corrosion rate reaches 17 μm/a. The surface corrosion layer of AZ61 alloy formed in Wanning with obvious surface cracking is thick and loose, and the emergence of chloride ions is caused by the crystallization of salt atmosphere on the surface of Wanning sample. The corrosion product layer of AZ61 alloy form in Xishuangbanna atmosphere is thin. The thickness of the corrosion product layer of AZ61 alloy in the industry atmosphere of Jiangjin is between Wanning and Xishuangbanna. Hydrated basic magnesium carbonate is found in the corrosion layer of Wanning sample through comprehensive analysis.
Key words:  AZ61 magnesium alloy  atmospheric corrosion  environment  assessment
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