改性纳米SiC粉体对铸造304不锈钢腐蚀性能的研究  

Study on Corrosion Properties of As-cast 304 Stainless Steel Reinforced by Modified SiC Nano-powders

作　　者：陈美玲[1] 王涛[1] 杨莉[1] 杨军[1] 

机构地区：[1]大连交通大学材料科学与工程学院无机超细粉体制备及应用辽宁省重点实验室,辽宁大连116028

出　　处：《热加工工艺》2011年第9期36-38,42,共4页Hot Working Technology

基　　金：微纳米粉体同时提高金属材料强韧性与耐蚀性研究(20070150002)

摘　　要：在生产条件下采用冲入法制备了改性纳米SiC粉体强化铸造304不锈钢。利用静态浸泡试验、电化学分析法研究了改性纳米SiC粉体对304不锈钢点腐蚀和晶间腐蚀性能的影响。结果表明:经改性纳米SiC粉体强化处理后的304不锈钢耐腐蚀性得到有效提高;添加纳米SiC粉体的304不锈钢在强酸条件下表现出优越的抗晶间腐蚀性能;添加纳米SiC粉体的304不锈钢的电极-电位提高了68 mV、自腐蚀电流减小0.122 mA、腐蚀速率降低了90.12%。The corrosion resistance of as-cast 304 stainless steel reinforced by modified SiC nano-powders was prepared under industrial conditions.The pitting corrosion and intergranular corrosion with SiC nano-powders were investigated by static immersion test and electrochemical analysis.The results show that the corrosion resistance of cast austenitic stainless steel is improved by modified SiC nano-powders.Austenitic stainless steel with modified SiC nano-powders show excellent resistance to intergranular corrosion.The electrode potential of austenitic stainless steel with modified SiC nano-powders is increased by 68 mV.The corrosion current is decreased by 0.122 mA.The corrosion rate of the austenitic stainless steel with nano-SiC powder is reduced by 90.12%.

关 键 词：改性纳米SIC粉体 奥氏体不锈钢 点腐蚀 晶间腐蚀 极化曲线 

分 类 号：TG174[金属学及工艺—金属表面处理]