中文摘要：

采用氧化．冷凝液浸泡循环方法模拟了汽车长距离行驶条件下消声器的内部服役环境，并对比研究了409，429，436，439和441等5种不锈钢的冷凝液腐蚀行为。结果表明：5种不锈钢表面氧化／腐蚀产物膜均主要由ChO，和Fe2O3组成。合金元素CrNMo对不锈钢表面产物膜电阻及电荷转移电阻的影响最为显著。腐蚀坑深度从大到小依次为409，439，441，429436不锈钢，439与441不锈钢以及429与436不锈钢的腐蚀深度相差很小，并且5种不锈钢在汽车长距离行驶条件下均表现出良好的耐蚀性。

英文摘要：

One oxidation-condensate immersion cyclic method was used to simulate muffler inter- nal service environment under the long-distance driving conditions. The corrosion behavior of type 409, 429, 436, 439 and 441 stainless steels was investigated in the condensate solutions. The results show that the oxidation/corrosion product films on the surfaces of these five steels are mainly com- posed of Cr203 and Fe203. The alloying elements Cr and Mo play the most important role in the re- sistance of product films and charge transfer processes on steel surfaces. Pit depth decreases in or- der of 409, 439, 441,429 and 436, but there is small depth difference between 439 and 441 as well as 429 and 436. Moreover, these five stainless steels show good pit resistance in the simulated processes of long-distance driving trips.