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| CORROSION OF STAINLESS STEELS IN SEAWATER SPLASH ZONE |
| 青岛海洋腐蚀研究所 |
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Abstract 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 025mm.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.
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Received: 02 March 2001
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