Electrochemical Study of Stainless Steel Anchor Bolt Corrosion Initiation in Corrosive Underground Water

Application of low-nickel stainless steel anchor was one of the economical and effective methods to solve the durability problem of slope engineering. At present, there are scarce reports about corrosion characteristics of low-nickel stainless steel in various underground waters. For investigating t...

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Main Authors: Fangping Ma, Qing Zeng, Xiangyu Lu, Tong Wu, Xiao Lu, Tianyi Zhang, Xingguo Feng
Format: Article
Language:English
Published: MDPI AG 2021-08-01
Series:Processes
Subjects:
Online Access:https://www.mdpi.com/2227-9717/9/9/1553
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spelling doaj-6917349920d34a4e86a4f4278ce30f0a2021-09-26T01:05:37ZengMDPI AGProcesses2227-97172021-08-0191553155310.3390/pr9091553Electrochemical Study of Stainless Steel Anchor Bolt Corrosion Initiation in Corrosive Underground WaterFangping Ma0Qing Zeng1Xiangyu Lu2Tong Wu3Xiao Lu4Tianyi Zhang5Xingguo Feng6Guoneng Dadu River Hydropower Development Co., Ltd., No. 7 Tianyun Road, High-Tech Zone, Chengdu 610041, ChinaTianfu Jingrong Center, Sichuan Energy Internet Research Institute, Tsinghua University, Building No. 5th, District A, Science City of Chengdu, Chengdu 610042, ChinaCollege of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, ChinaCollege of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, ChinaCollege of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, ChinaCollege of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, ChinaCollege of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, ChinaApplication of low-nickel stainless steel anchor was one of the economical and effective methods to solve the durability problem of slope engineering. At present, there are scarce reports about corrosion characteristics of low-nickel stainless steel in various underground waters. For investigating the corrosion initiation of stainless steel anchor bolt in corrosive underground water, the effect of SO<sub>4</sub><sup>2−</sup>, HCO<sub>3</sub><sup>−</sup> and pH value on the corrosion behavior of 201 low-nickel stainless steel was studied via electrochemical methods. As the SO<sub>4</sub><sup>2−</sup> concentration, HCO<sub>3</sub><sup>−</sup> concentration or pH value increase, the open circuit potential and polarization resistance increase, while the double-layer capacitance, donor density and passive current density decrease. The results indicate that corrosion is inhibited by SO<sub>4</sub><sup>2−</sup>, HCO<sub>3</sub><sup>−</sup> and OH<sup>−</sup> in underground water. In addition, the inhibitive efficiency of SO<sub>4</sub><sup>2−</sup> and HCO<sub>3</sub><sup>−</sup> increases with the SO<sub>4</sub><sup>2−</sup> and HCO<sub>3</sub><sup>−</sup> concentration.https://www.mdpi.com/2227-9717/9/9/1553underground watercorrosionlow-nickel stainless steelpassive film
collection DOAJ
language English
format Article
sources DOAJ
author Fangping Ma
Qing Zeng
Xiangyu Lu
Tong Wu
Xiao Lu
Tianyi Zhang
Xingguo Feng
spellingShingle Fangping Ma
Qing Zeng
Xiangyu Lu
Tong Wu
Xiao Lu
Tianyi Zhang
Xingguo Feng
Electrochemical Study of Stainless Steel Anchor Bolt Corrosion Initiation in Corrosive Underground Water
Processes
underground water
corrosion
low-nickel stainless steel
passive film
author_facet Fangping Ma
Qing Zeng
Xiangyu Lu
Tong Wu
Xiao Lu
Tianyi Zhang
Xingguo Feng
author_sort Fangping Ma
title Electrochemical Study of Stainless Steel Anchor Bolt Corrosion Initiation in Corrosive Underground Water
title_short Electrochemical Study of Stainless Steel Anchor Bolt Corrosion Initiation in Corrosive Underground Water
title_full Electrochemical Study of Stainless Steel Anchor Bolt Corrosion Initiation in Corrosive Underground Water
title_fullStr Electrochemical Study of Stainless Steel Anchor Bolt Corrosion Initiation in Corrosive Underground Water
title_full_unstemmed Electrochemical Study of Stainless Steel Anchor Bolt Corrosion Initiation in Corrosive Underground Water
title_sort electrochemical study of stainless steel anchor bolt corrosion initiation in corrosive underground water
publisher MDPI AG
series Processes
issn 2227-9717
publishDate 2021-08-01
description Application of low-nickel stainless steel anchor was one of the economical and effective methods to solve the durability problem of slope engineering. At present, there are scarce reports about corrosion characteristics of low-nickel stainless steel in various underground waters. For investigating the corrosion initiation of stainless steel anchor bolt in corrosive underground water, the effect of SO<sub>4</sub><sup>2−</sup>, HCO<sub>3</sub><sup>−</sup> and pH value on the corrosion behavior of 201 low-nickel stainless steel was studied via electrochemical methods. As the SO<sub>4</sub><sup>2−</sup> concentration, HCO<sub>3</sub><sup>−</sup> concentration or pH value increase, the open circuit potential and polarization resistance increase, while the double-layer capacitance, donor density and passive current density decrease. The results indicate that corrosion is inhibited by SO<sub>4</sub><sup>2−</sup>, HCO<sub>3</sub><sup>−</sup> and OH<sup>−</sup> in underground water. In addition, the inhibitive efficiency of SO<sub>4</sub><sup>2−</sup> and HCO<sub>3</sub><sup>−</sup> increases with the SO<sub>4</sub><sup>2−</sup> and HCO<sub>3</sub><sup>−</sup> concentration.
topic underground water
corrosion
low-nickel stainless steel
passive film
url https://www.mdpi.com/2227-9717/9/9/1553
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