材料期刊网

总结了5种不锈钢在青岛海域飞溅区暴露16年的腐蚀行为和 规律.2Cr13在飞溅区不能维持其表面的钝态，耐蚀性较差.含16%Cr以上的不锈钢在飞 溅区有较好的耐蚀性.1Cr18Ni9Ti、00Cr19Ni10和000Cr18Mo2在飞溅区暴露2～4年间，F179 在1、2年间，点蚀速度较大，此后它们的点蚀深度随时间无明显加深.不锈钢在飞溅区的点 蚀密度随暴露时间增大.增加Cr含量、添加Mo能提高不锈 钢在飞溅区的耐蚀性.

Corrosion results of 5 types of stainless steels ex posed to splash zone at Qingdao Sea area of China were obtained.Corrosion behavi or and law of stainless steels in splash zone were summarized.2Cr13 could not ke ep passive state in splash zone.Its corrosion resistance was poor.Stainless stee ls containing more than 16% Cr shown good corrosion resistant in splash zone,and their maximum pitting depths at Qingdao Sea area for 16 years exposure were les s than 025mm.It was found that pitting rate is big for 1Cr18Ni9Ti,00Cr19Ni10,0 00 Cr18Mo2 during the 2 to 4 years and for F179 during 1,2 years,after which the pi tting depth deepened not obviously with exposure time.Pit density of stainless s teels in splash zone increased with exposure time.Crevice corrosion of stainless steels in splash zone formed and grew more easily than pitting corrosion.Increas ing Cr content and adding Mo enhanced corrosion resistance in stainless steels i n splash zone.Corrosion behavior of stainless steels in splash zone was similar t o their corrosion behavior in marine atmosphere.Stainless steels in splash zone corroded seriously than ones in marine atmosphere.