|
|
|
| PASSIVATION BEHAVIOUR OF CHROMIUM PLATING FILM AND ITS CATHODICALLY MODIFIED SPECIES |
| Wen Guomou; Ma Tingchun; Fang Bingfu; Zheng Fuyang; Chen Aicheng(Fujian Institute of Research on the Structure of Matter Chinese Academy Of Sciences) |
|
|
|
|
Abstract Electrolytic plating chromium plain film, alternately multi-layered palladium alld chromium plating film and palladium-containing chromium composite plating film on AISI 430 stainless steel were compared for the purpose of showing the effect of palladium as cathodic modification element in chromium plating film. The electrochemical behaviour of the above coatillgs was examined in comparison to 430SS substrate by voltammetry and impedance spectroscopy. At potentials corresponding to the active-passive transition for chromium film, net cathodic current was measured oil those palladium-containing platings. While chromium may stably exist in either the passive or active state, small amoullt additioll of palladium significantly increases the corrosion resistance of chromium plating in deaerated 5% and 20% sulfuric acid solutions in consequence of spontaneous passivation. The tendency is more propounced for the composite coating. The capacitive circle which appears in the low frequency range of IHz-0.01Hi on the impedance diagrams is considered as ajssociated with the passivation process.
|
|
Received: 25 February 1995
|
Cite this article:
Wen Guomou; Ma Tingchun; Fang Bingfu; Zheng Fuyang; Chen Aicheng(Fujian Institute of Research on the Structure of Matter Chinese Academy Of Sciences). PASSIVATION BEHAVIOUR OF CHROMIUM PLATING FILM AND ITS CATHODICALLY MODIFIED SPECIES. J Chin Soc Corr Pro, 1995, 15(1): 21-27.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1995/V15/I1/21
|
| 1TomashovND．Corrosion,1958,4:382SternM．JElectrochem．Soc,1958,105:6383HigginsonA．BritCorros．J．;1989,24(4):2974AnnualBookofASTMStandards,ASTMG5725曹楚南．腐蚀电化学原理,北京:化学工业出版社,1985．2866GerretsanJH,DewitJHW．Cor．Sci,1990,30(11):10757DobbelaarJAL,DeWitJHW．J．Electrochem．Soc,1992,139(3):7168AgarwalaVS,BieferGJ．Corrosion,1972,28(2):649TomashovND,Cherno、GP,UstinskyEN．Corrosion,1984,40(3):134 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
