金属学报（英文版）
金屬學報（英文版）
금속학보（영문판）
ACTA METALLURGICA SINICA (ENGLISH LETTERS)
2005年
3期
416-422
,共7页
electrodeposition%Zn-Ni-SiO2 composite coating%silane coupling treatment%chrome-free%environmental friendliness
The fixing of a silane coupling agent to Zn-Ni-silica (SiO2) composite coatings was studied for the purpose of developing a coating process as an alternative to chromating. The corrosion resistance of Zn-Ni-silica composite coatings was remarkably improved by the silica nanoparticles in the composite, which were dispersed in the surface of this film. The silane coupling agent formed chemical bonds with the inorganic silica particles during the silane coupling treatment on these composite coatings. The treatment suppressed the formation of white corrosion products to the same extent as chromating, as measured in salt spray tests. It is concluded that treating Zn-Ni-silica composite coatings with silane coupling agents is a viable alternative technique to chromating.
