摘要
采用质量损失法系统研究了65Mn板材和W6Mo5Cr4V2高速钢钻头表面的Ni-P-Al2O3镀层的腐蚀、冲蚀和磨损行为。用扫描电镜(SEM)和能谱仪(EDS)进行形貌观察和成分分析。结果表明,Ni-P-Al2O3镀层的腐蚀和冲蚀性能优于316L不锈钢,镀层的腐蚀和冲刷腐蚀速率随介质温度升高而增大,400℃热处理降低镀层的腐蚀和冲刷腐蚀抗力。镀层在Na2S,HCl和H2SO4溶液中的腐蚀速率依次增大,在Na2S和H2SO4中发生均匀腐蚀,而在HCl溶液中则是局部腐蚀。在大气环境中,镀层的耐磨性不如高速钢基体。
The corrosion, erosion-corrosion and wear behaviors of Ni-P-Al2O3 coating on the surfaces of steel 65Mn and W6Mo5Cr4V2 were systematicly studied by weight loss method. The surface morphology and chemical composition were also analyzed by means of SEM and EDS respectively. The results show that the corrosion and erosion-corrosion resistances of Ni-P-Al2O3 coating more excellent than those of 316L stainless steel, and increased with the increase of medium temperature and decreased when the steel was heat treated at 400 C. The corrosion rates of the Ni-P-Al2O3 coating in different solution under the same test condition were in the order of Na2S〈HCI〈 H2SO4. The main corrosion characteristic of the Ni-P-Al2O3 coating was uniform corrosion in 20%Na2S and 20% H2SO4 solutions, localized corrosion in 20%HCl solution. The were resistance of Ni-P-Al2O3 coating is poorer than that of high-speed steel in the air.
出处
《腐蚀与防护》
CAS
北大核心
2013年第4期310-313,共4页
Corrosion & Protection
基金
南京工程学院创新基金重大项目(CKJA201202)
