摘要
为了深入了解铬铝化合金对低碳钢耐蚀性能的影响,对J55钢作铬铝合金化,采用动电位极化曲线和电化学阻抗谱研究了其在3.5%NaCl溶液中的电化学腐蚀行为,并考察了预腐蚀对其电化学腐蚀过程的影响。结果表明:J55钢铬铝合金化后的开路电位明显正移,极化电阻增大,自腐蚀电流密度减小,腐蚀速率下降;预腐蚀后,产生了腐蚀产物膜电阻,使总极化电阻增大,相应的腐蚀速率降低,其中铬铝合金钢的腐蚀产物膜电阻较J55钢的明显增大。
Cr-Al alloying of low carbon steel(J55 steel) was conducted. The effect of Cr-Al alloying on the electrochemical corrosion behavior of J55 steel in 3. 5% NaCl solution was investigated based on measurements of potentiodynamic polarization curve and electrochemical impedance spectrum. Moreover,the effect of pre-corrosion on the electrochemical corrosion process of the steel was examined. Results indicated that,after Cr-Al alloying,the open circuit potential of J55 steel significantly shifted positively,which was accompanied by increase of polarization resistance,decrease of corrosion current density,and decline of corrosion rate. Besides,pre-corrosion led to increase of corrosion product film resistance of Cr-Al alloyed steel as well as a certain degree of resistance polarization and reduced electrochemical corrosion rate.
出处
《材料保护》
CAS
CSCD
北大核心
2013年第10期33-36,6,共4页
Materials Protection
基金
西安石油大学全日制硕士研究生创新基金(2012cx110522)
陕西省重点学科专项资金(YS30230203)资助
