耐锌液腐蚀热喷涂涂层的研发现状_图文

1、 236Vol.23No.6 201111CORROSION SCIENCE AND PROTECTION TECHNOLOGY Nov.2011,510651:,.,.:;:TG178:A:10026495(201106045304R&D Status of Corrosion-resistant Thermal Spray Coatings toMolten ZincDENG Chun-ming,LIU Min,ZENG Cui-li,DENG Chang-guang,KUANG Zi-qi,MAO Jie Guangzhou Research Institute of Nonfe

2、rrous Metals,Guangzhou510651Abstract:Zinc plated steel has found its wide applications in all kinds of industries,but some key parts in the production line,such as bearing and sink roller,suer from serious corrosion of molten zinc,which greatly aects the production eciency and the quality of product

3、s.Thermal spray coatings serve as important corrosion resistance coatings to get rid of the above troubles.The R&D status of thermal spray coatings against zinc corrosion and their corresponding manufacturing technique were introduced,and the corrosion failure mechanism for thermal spray coating

4、s was systematically analyzed.The importance of sealing reagent was emphasized for thermal spray coatings.Finally,the improvement in the corrosion resistance to zinc molten was directed to the inhibition of crack formation.Key words:corrosion of zinc molten;thermal spray coatings;corrosion failure m

5、echanism,.,;.316L,15d,.,45423Substrate Materials and CET Thickness,µmNo.Bond coat Service life,hPS-A138PS-Z274HV-W1209HV-B2358HV-B3AISI440C/5060012.4×106HV-B4Co-30mass%245Cr-4mass%HV-B5W-1.2mass%100600C/15.0×106HV-B650600HV-B7500321Note:(PS-A Al2O3,PS-ZZrO2-8Y2O3,HV6:455118.3912.6220.

6、9735.00 2.6510.37 220.117.587.8359.81 1.76 2.91,Fe-Al.,Fe-Al,Zn Fe-Al,ZnFe-Al Al,Fe-Al-Zn ,Zn,.Fe-Al.11,Fe2Al5FeAl Fe-Al,Fe-Al,Fe-Al,Fe-Al,Fe-AlFe-Al.:Fe2Al5,Fe2Al5;FeAlFeAl.Fe2Al5,Fe2Al5Zn0.4,FeAl2O4,.Fe2Al5,Fe2Al5Zn0.4,.FeAlFeAl FeAl2O4,.FeAl,.Yan12Fe2Al5,Fe2Al5(2:Fe2Al5Fe2Al5Zn x(+L(liquid phaseL+(FeZn7L+L.(Fe2Al5Zn x Fig.2Schematic diagram o