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
陈美玲， 王 涛， 杨 莉， 杨 军
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作者单位：(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)
中文关键字：改性纳米SiC粉体； 奥氏体不锈钢； 点腐蚀； 晶间腐蚀； 极化曲线
英文关键字：modified SiC nano-powder; austenitic stainless steel; pitting corrosion; intergranular corrosion; polarization curve
中文摘要：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%。
英文摘要：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%.