CORROSION BEHAVIOR OF A HIGH-CHROMIUM DUPLEX STAINLESS-STEEL WITH MINOR ADDITIONS OF RUTHENIUM IN SULFURIC-ACID

被引：14
作者：
POTGIETER, JH [1 ]
BROOKES, HC [1 ]
机构：
[1] UNIV NATAL,DEPT CHEM,DURBAN 4001,SOUTH AFRICA
来源：
CORROSION | 1995年 / 51卷 / 04期
关键词：
ANODIC DISSOLUTION; CHROMIUM; CORROSION RESISTANCE; DUPLEX STAINLESS STEEL; HYDROGEN EVOLUTION; RUTHENIUM; SULFURIC ACID;
D O I：
10.5006/1.3293596
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of small ruthenium additions on the corrosion behavior of high-chromium duplex stainless steels (DSS) was studied. Ruthenium additions (less than or equal to 0.28%) increased the corrosion resistance of the base alloy by simultaneously improving hydrogen evolution efficiency and inhibiting anodic dissolution. The corrosion behavior of the high-chromium DSS with small ruthenium additions differed somewhat from behavior of similar duplex alloys of the 22%-Cr type. The lowering of hydrogen overpotential, which promotes an elevated corrosion potential leading to passivity was much more significant in the 29%-Cr duplex alloys than in the 22%-Cr types.
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页码：312 / 320
页数：9
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