|
|
|
| CORROSION BEHAVIOR OF NANOCRYSTALLIZED BULK 304 STAINLESS STEEL II THE RESEARCH OF PROTECTION OF THE PASSIVE FILM |
| ;;;; |
| 中国科学院金属研究所 |
|
|
|
|
Abstract By employing Mott-Schottky analysis in cinjumction with the point defect model(PDM),we compared donor density and donor diffusion coefficients in the passive films formed on the surface of nanocrystallized bulk 304 stainless steel(NB304ss) and cast 304 stainless steel (304ss )in 0.05 mol/L H2SO4+ 0.25 mol/L Na2Ao4 solution. The donor density at the metal/film interface of the NB304SS was lower than that at the metal film interface of the cast 304SS.Based on the MOtt-Schottky analysis, an exponential relationship between donor density and formation potentials of the passive films on the NB304SS and the cast 304SS was built up. The results showed that the donor diffusion coefficients in the passive film formed on the surface of NB304SS was built up. The results showed that in the cast 304SS.The lower donor density restrained jthe electrochemical reaction in the passive film and improved the stability of the passive film. That is the reason why the passive film formed on the NB304SS was more protective.
|
|
Received: 08 November 2005
|
|
|
[1]Ye W,Li Y,Wang F H.Effects of nanocrystallization on the corro-sion behavior of 309 stainless steel[J].Electrochemica Acta,(inpress)
[2]Li X L,Li Y,Wang F H.Study on the electrochemical corrosion be-havior of sputtered Fe20Cr nanocrystalline coating[J].J.Chin.Soc.Corros.Prot.,2002,22(2):84-88(李雪莉,李瑛,王福会.Fe20Cr溅射纳米涂层腐蚀电化学性能研究[J].中国腐蚀与防护学报,2002,22(2):84-88)
[3]Meng G Z.Effect of nanocrystallization on the electrochemical corro-sion behavior of Fe-Cr alloys[D].Shenyang:Institute of Metal Re-search,CAS,Ph.Dissertation,2005(孟国哲.Fe-Cr纳米涂层的腐蚀行为研究[D].沈阳:中科院金属研究所,博士论文,2005)
[4]Li N,Li Y,Wang S G,Wang F H.Corrosion behaviour of nanocrys-tallized bulk 304 stainless steel I.The research of the passive film'santi-chloride ion attack[J].J.Chin.Soc.Corros.Prot.,2007,27(2):80-83(李楠,李瑛,王胜刚,王福会.轧制纳米块体304不锈钢腐蚀行为的研究I.钝化膜耐氯离子侵蚀能力研究[J].中国腐蚀与防护学报,2007,27(2):80-83)
[5]Chao C Y,Lin L F,MacDonald D D.Apoint defect model for anod-ic passive films I.Film growth kinetics[J].J.Electrochem.Soc.,1981,128:1187-1194
[6]Lin L F,Chao C Y,MacDonald D D.Apoint defect model for anodicpassive filmsⅡ.Chemical breakdown and pit initiation[J].J.Elec-trochem.,Soc.,1981,128:1194-1198
[7]Chao C Y,Lin LF,MacDonald D D.Apoint defect model for anodicpassive filmsШ.Impedance response[J].J.Electrochem.Soc.,1982,129:1874-1879
[8]MacDonald D D,Biaggio S R,Song H.Steady-state passive films-interfacial kinetic effects and diagnostic-criteria[J].J.Electro-chem.Soc.,1992,139:170-177
[9]Kloppers M J,Bellucci F,Latanision.Electronic properities and de-fect structure of Fe and Fe-Cr passive film[J].Corrosion,1992,48:229
[10]MacDonald D D,MacDonald M U.Theory of steady-state passivefilm[J].J.Electrochem.Soc.,1990,137:2395 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
