摘要: |
介绍了Ni、n-SiC∕Ni、n-Al2O3∕Ni 3种镀层在5%H2SO4、5% H2SO4+3.5%NaCl腐蚀96 h的失重情况,用SEM和X射线衍射仪分别观测了腐蚀形貌及成分分析。深入对腐蚀镀层进行了理论分析,表明在腐蚀过程中由于镀层组织结构不均匀产生了微观腐蚀电池。 |
关键词: 腐蚀 晶界 微电池 |
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Study on Static Corrosion Experiment of Nickel-Base Composite Coatings |
CHEN Xiao-Lei,XIE Feng-Kuan,ZHUANG Shu-Juan
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National Key Lab for Remanufaction, Beijing 100072
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Abstract: |
Weight loss of Ni、n-Sic/Ni and n-Al2O3/Ni coatings after 96 hours corrosion in 5%H2SO4、5%H2SO4+3.5%NaCl are introduced,corrosion morphology and components are analyzed by SEM and X-Ray diffraction. The theories of corrosion coatings are discussed as well. The results show that micro-corrosion batteries are generated due to non-uniform coating structure. |
Key words: corrosion crystal boundary micro battery |