|
|
|
Abstract Effect of hydrogen on anodic dissolution and passivation of 304 stainless steel has been studied in 1N H_2SO_4+0.1N HCl solution at controlled potentials. Ion concentrations of Fe, Cr and Ni dissolved in the solution are determined using plasma emission spectroscopy. Thus, the amount of net corrosion of the steel containing hydrogen is obtained. The results show that hydrogen promotes strongly anodic dissolution of 304 stainless steel in the transpassive potential region, (E=1.0V, SCE). The rate of dissolution increases with hydrogen content. The ion concentrations of Fe, Cr and Ni in fhe solution under different charging time are analyzed. The ion ratio of Fe, Cr and Ni is about 78:16:6 for uncharged specimen, while it is the same as that of the chemical composition of the steel for hydrogen charged specimen, i.e., Fe:Cr:Ni=72:19:9. This result reveals that hydrogen decreases the stability of passive film. In the passive potential region(E=0.5V), however, hydrogen has little effect on the anodic behavior. The ion ratio is 82:11:7 for both hydrogen charged and uncharged specimens. The amount of net corrosion of the specimens with hydrogen is about equal to that of the specimen without hydrogen.
|
|
Received: 25 April 1988
|
[1] 姚京;褚武扬;肖纪美,金属学报,19,445(1983)
[2] 褚武扬;王核力;马若涛;肖纪美,金属学报,21(1) ,A86(1985)
[3] 乔利杰;褚武扬;肖纪美,金属学报,23(3) ,A228(1987)
[4] 乔利杰;褚武扬;肖纪美,北京钢铁学院学报,(2) ,113(1986)
[5] 乔利杰;褚武扬;肖纪美,中国腐蚀与防护学报,6(4) ,273(1986)
[6] Lijie,Q.(乔利杰),Wuyang,C.(褚武扬);Chimei,X.(肖纪美),Scripta metall,5,(1988)
[7] 赵克清;肖纪美;胡茂圃,中国腐蚀与防护学报,4(3) ,179(1984)
[8] Hasegawa, M.; Osawa, M., Corrosion, 36(2) . 67(1980)
[9] Hasegawa, M.; Osawa, M., Corrosion, 39(4) , 115(1983) |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
