摘要
文章采用植酸水溶液对纯镁进行化学转化处理,通过SEM、EDS、电化学极化曲线法研究了温度、时间、浓度以及pH值对表面转化膜性能的影响。结果表明,转化膜的厚度和表面裂纹尺寸随着转化处理液浓度及处理时间的增加而增大,但时间过长或浓度过大均会导致转化膜的耐蚀性下降;溶液pH从1增大到5时,转化膜的裂纹尺寸呈现减小趋势,耐蚀性先增大后减小;转化膜表面裂纹尺寸随温度升高先增大后减小,温度在20℃～60℃之间,形成的转化膜耐蚀性较好,80℃和90℃时,形成的转化膜耐蚀性显著降低。
Section 1 of the full paper explains our experimental procedure.Analyzing the results presented in Figs.1 and 2,subsection 2.1 finally points out that:(1) the size of a crack increases with increasing thickness of phytic acid conversion coating;when the size of the crack is too big,the corrosion resistance of the conversion coating decreases;(2) consequently,only when the coating is relatively complete and dense can it possess good corrosion resistance.Analyzing the results presented in Figs.3 and 4,subsect...
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2009年第4期532-537,共6页
Journal of Northwestern Polytechnical University
关键词
化学转化处理
植酸
镁
转化膜
coatings
magnesia
phytic acid
conversion coating
corrosion resistance
