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%NaC1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.
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