Corrosion Behaviour of 304 Austenitic, 15-5PH and 17-4PH Passive Stainless Steels in acid solutions

被引：22

作者：

Banda, M. Lara ^{[1
]}

Tiburcio, C. Gaona ^{[1
]}

Zambrano-Robledo, P. ^{[1
]}

Cabral, J. A. ^{[1
]}

Estupinan, F. ^{[1
]}

Baltazar-Zamora, M. A. ^{[2
]}

Croche, R. ^{[2
]}

Vera, E. ^{[3
]}

Almeraya-Calderon, F. ^{[1
]}

机构：

[1] Univ Autonoma Nuevo Leon, Fac Ingn Mecan & Elect, CIIIA, Av Univ S-N,Ciudad Univ, San Nicolas De Los Garza 66455, Nuevo Leon, Mexico

[2] Univ Veracruzana, Fac Ingn Civil Xalapa, Circ G Aguirre Beltran S-N, Xalapa 91000, Veracruz, Mexico

[3] Univ Pedag & Tecnol Colombia, Sede Cent Tunja, Boyaca, Colombia

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2018年 / 13卷 / 11期

关键词：

Stainless Steels; Precipitation Hardening; Corrosion; Passivation; TRANSPASSIVE DISSOLUTION MECHANISM; FILMS;

D O I：

10.20964/2018.11.12

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The objective of this work was to study is use electrochemical techniques to determinate the growth conditions, characteristics and resistance of passive layers of stainless steel (SS): 304 austenitic, 17-4PH (precipitation hardening) and 15-5PH. Passivation of the SS was performed in 15% citric acid at temperatures of 25 and 49 degrees C. The corrosion kinetics was obtained using the electrochemical technique as potentiodynamic polarization (PP), in a three-electrode system. The electrolytes used were sodium chloride (5 wt. % NaCl) and sulfuric acid (1 wt. % H2SO4). Passivation in citric acid allows obtain passive layers at temperatures of 49 degrees C with immersion times of 30 minutes. In precipitation hardening steels, passive layers up to 360 mV in sodium chloride. Can be obtained. In sulfuric acid, there is a mechanism of passivation - transpassivation - secondary passivation, this due to the high electropositive values of potential.

引用

页码：10314 / 10324

页数：11

共 26 条

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[2]

[Anonymous], 1999, A96709 ASTM

[3]

ASTM, 2014, G514 ASTM

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