|
|
|
| AN ELECTROCHEMICAL INVESTIGATION ON THE INHIBITION EFFECT OF PIPERIDINE FOR TYPE 304 STAINLESS STEEL IN NaCl MEDIA |
| Tang Zilong;Song Shizhe(Dept. of Materials; Tianjin University) |
|
|
|
|
Abstract The inhibition effect of piperidine (PD) for pitting initiation and propagation of AISI 304 stainless steel in NaCl solution of various concentrations was investigated by potentiodynamic anodic polarization and P-G transient inhibition measurements. In order to evaluate the long-term inhibition performance of PD, the pitting breakdown potentials of the system, 304 SS/0.5 mol/L NaCl + 5 mmol/L PD, were measured continuously for 1100 hours. The results showed that the pitting propagation was inhibited to a certain extent. The possible inhibition mechanism of PD for pitting initiation and propagation was discussed according to the competitive adsorption theory. In addition, a new idea of "Critical Ratio" of PD concentration to Cl- concentration was suggested for the judgement of inhibition effect. For the system in which the ratio of PD concentration to Cl- concentration was greater than the "Critical Ration", the inhibition role was more satisfactory than that in which the ratio is less than the criterion. The anodic desorption of the inhibitor was discussed preliminarily.
|
|
Received: 25 April 1996
|
| 1ZucchiF,OmarIH,ThabaneliG．6SEIC,1985,8:15352苏润西,宋诗哲．腐蚀科学与防护技术,1993,5(4):2493DeberryDWViehbeckA．Corrosion,1988,44:2994宋诗哲,曹楚南．中国腐蚀与防护学报,1990,10(4):2975TangZL,SongSZ．CorrosionScience,1993,34(10):16076ChaudharyRS;NamboodhiriTKG,SinghIB．Br．Corros．J,1989,24(4):2737LynchPF,BrownCW．Corrosion//82;NACE,Paper218宋诗哲,唐子龙．腐蚀科学与防护技术,1992,4(1):27 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
