Effects of Test Conditions on Measurement of Pitting Potential of Stainless Steels by Using Potential Dynamic Polarization Curve

JI Kaiqiang; HE Zhaoru; YAN Xiaobo; LI Guangfu

doi:10.11973/fsyfh-202109002

Corrosion & Protection > 2021 > 42(9): 7-10,60. > DOI: 10.11973/fsyfh-202109002

JI Kaiqiang, HE Zhaoru, YAN Xiaobo, LI Guangfu. Effects of Test Conditions on Measurement of Pitting Potential of Stainless Steels by Using Potential Dynamic Polarization Curve[J]. Corrosion & Protection, 2021, 42(9): 7-10,60. DOI: 10.11973/fsyfh-202109002

Citation:

PDF (1501 KB)

Effects of Test Conditions on Measurement of Pitting Potential of Stainless Steels by Using Potential Dynamic Polarization Curve

Shanghai Key Laboratory of Engineering Materials Application and Evaluation, Shanghai Research Institute of Materials, Shanghai 200437, China

More Information

Received Date: December 06, 2020

Graphical Abstract

Abstract

Abstract

Based on the commonly used stainless steel pitting corrosion potential test standards at home and abroad, using the potentiodynamic polarization curve measurement method, the effects of residence time after final polishing, potential scan rate and solution pre-deoxidation time on the self-corrosion potential (E_corr) and pitting potential of 304L austenitic stainless steel and S32101 duplex stainless steel in 3.5% NaCl solution were studied. The results showed that when the residence time after final polishing was extended from 0 h to 24 h, E_corr of two kinds of steel was significantly increased, and the pitting corrosion potential was also increased. After potential scanning rate was increased from 10 mV/min to 20 mV/min, the change of pitting corrosion potential of two kinds of steel was not obvious. When solution pre-deoxygenation time was increased from 0.5 h to 1 h, E_corr of two kinds of steel was decreased and pitting potential was increased.
- stainless steel,
- pitting corrosion,
- potential dynamic polarization curve,
- potential scan rate

FullText(HTML)

References (9)

References

[1]	DA CUNHA BELO M,WALLS M,HAKIKI N E,et al. Composition,structure and properties of the oxide films formed on the stainless steel 316L in a primary type PWR environment[J]. Corrosion Science,1998,40(2/3):447-463.
[2]	ANOOP M B,BALAJI RAO K,LAKSHMANAN N. Safety assessment of austenitic steel nuclear power plant pipelines against stress corrosion cracking in the presence of hybrid uncertainties[J]. International Journal of Pressure Vessels and Piping,2008,85(4):238-247.
[3]	HOMONNAY Z,KUZMANN E,VARGA K,et al. Comprehensive investigation of the corrosion state of the heat exchanger tubes of steam generators.Part Ⅱ.Chemical composition and structure of tube surfaces[J]. Journal of Nuclear Materials,2006,348(1/2):191-204.
[4]	李劲,蒋益明. 不锈钢腐蚀评价技术研究及其应用[C]//2010年全国腐蚀电化学及测试方法学术会议论文集. 杭州:[s.n.],2010.
[5]	赵迪,李光福,纪开强,等. 304L/ER316L奥氏体不锈钢焊接板的点蚀行为[J]. 腐蚀与防护,2020,41(1):1-8,46.
[6]	赵迪,李光福,纪开强,等. 乏燃料池用S32101/ER2209双相不锈钢焊接板的点蚀行为[J]. 腐蚀与防护,2019,40(12):861-870.
[7]	金玉婷,纪开强,胡俊,等. 环境因素对两种不锈钢在模拟海水中点蚀行为的影响[J]. 腐蚀与防护,2018,39(9):663-667,672.
[8]	段传成,程从前,赵杰. 电位扫描速率对测试304不锈钢腐蚀行为的影响[J]. 腐蚀与防护,2013,34(3):197-199.
[9]	BABOIAN R. Investigations of galvanically induced localized corrosion[M]//Localized Corrosion-Cause of Metal Fatigue.West Conshohocken:ASTM International,1972.

Cited By

Get Citation

PDF

XML

Article views (15) PDF downloads (5)

Turn off MathJax

Article Contents

Abstract

References

Effects of Test Conditions on Measurement of Pitting Potential of Stainless Steels by Using Potential Dynamic Polarization Curve

Abstract

References

Catalog

Export File

Citation

Format

Content