摘要
采用由4.0 g/L ZnO、4 g/L CaCl2、5%(体积分数)H3PO3、4 g/L酒石酸和3 g/L氯酸钠组成的锌钙系磷化液,在温度为70°C和电流密度为4 mA/cm2的条件下对1Cr18Ni9Ti不锈钢表面进行电化学磷化20 min。对比了所得磷化膜与采用相同磷化液化学磷化2 h所得膜层的表面形貌、相结构和耐蚀性。结果表明,与化学磷化相比,电化学磷化所需时间较短,所得膜层的结晶大小和分布均匀,耐腐蚀性更好。
Electrochemical phosphating was conducted on Cr18Ni9 Ti stainless steel in a zinc–calcium phosphating solution comprising ZnO 4.0 g/L, CaCl2 4 g/L, H3 PO3 5 vol.%, tartaric acid 4 g/L, and sodium chlorate 3 g/L at temperature 70 °C and current density 4 m A/cm2 for 20 min. The surface morphology, phase structure, and corrosion resistance of the phosphating film obtained electrochemically were compared with that prepared chemically in the same solution for 2 h. The results showed that electrochemical phosphating needed less time than chemical phosphating, and produced films with uniform size and distribution of crystals and better corrosion resistance.
作者
苑林
罗纯君
孙海静
孙杰
YUAN Lin;LUO Chunjun;SUN Haijing;SUN Jie(School of Environmental and Chemical Engineering,Shenyang Ligong University,Liaoning 110044,China;不详)
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2020年第9期546-548,共3页
Electroplating & Finishing
关键词
不锈钢
电化学磷化
耐蚀性
微观结构
stainless steel
electrochemical phosphating
corrosion resistance
microstructure
