Effect of MoO<sub>4</sub><sup>2-</sup> on underscale local corrosion of N80 steel in neutral solution

ZHU Yuanliang; QIU Yubing; GUO Xingpeng

您当前的位置：

首页 >

文章列表页 >

Effect of MoO₄^2- on underscale local corrosion of N80 steel in neutral solution

更新时间：2025-12-10

- Effect of MoO₄^2- on underscale local corrosion of N80 steel in neutral solution
- CIESC Journal Issue 5, Pages: 1228-1232(2008)
- 作者机构：
  
  华中科技大学化学化工系，材料化学与服役失效湖北省重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 May 2008，
  
  Published：05 May 2008
- 稿件说明：
移动端阅览
ZHU Yuanliang, QIU Yubing, GUO Xingpeng. Effect of MoO₄^2- on underscale local corrosion of N80 steel in neutral solution[J]. CIESC Journal, 2008, (5): 1228-1232.
DOI：

ZHU Yuanliang, QIU Yubing, GUO Xingpeng. Effect of MoO₄^2- on underscale local corrosion of N80 steel in neutral solution[J]. CIESC Journal, 2008, (5): 1228-1232. DOI：

摘要

设计了一种能够模拟垢下局部腐蚀自催化过程的闭塞电池，采用极化曲线和电化学阻抗方法研究了MoO42-对N80钢在近中性NaCl溶液中闭塞区内化学及电化学状态变化的影响。结果表明，MoO42-能有效地减缓闭塞区内pH值降低及Cl-浓集、减弱酸化自催化效应、抑制垢下局部腐蚀。MoO42-的作用机制在于使水合氧化铁腐蚀膜由阴离子选择性变为阳离子选择性，H+可以从膜下扩散出去，而Cl-难以扩散到膜下富集，抑制了腐蚀反应的阴极过程;同时MoO42-迁入闭塞区后增大了电极表面膜层阻抗，抑制了腐蚀反应的阳极过程。

Abstract

An occluded corrosion cavity (OCC) simulated cell was designed，and electrochemical impedance spectroscopy (EIS) and polarization curves measurement were employed to study the effect of MoO42- on the development of underscale local corrosion of carbon steel in neutral NaCl solution.The results suggested that MoO42- could abate pH decrease and Cl- enrichment

and inhibit the auto-catalyzing acidification effect inside the OCC

so retard the development of underscale local corrosion obviously.The inhibition mechanism of MoO42- was that MoO42- transformed the hydrate ferrous oxide deposition film from anions selective to cations selective，and the cathodic process of underscale local corrosion was suppressed when it migrated into OCC.Meanwhile

the migrated MoO42- resulted in increasing the impedance of the film on the substrate metal and so inhibited the anodic process of the corrosion reaction inside the OCC.

关键词

Keywords

references

Views

268

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

In field electrochemical detections and corrosion behavior of carbon steel samples

Analysis of flow field characteristics and mixing performance of different SK-type static mixers

Physics-informed spatio-temporal graph convolutional network for fermentation processes

Zn-doped PdO/ZrO2 with rich oxygen vacancies for the synthesis of diphenyl carbonate from CO2 and phenol

Multi objective optimization of flow and heat transfer characteristics of modified manifold microchannel heat sink based on machine learning

Related Author

LUO Yanan

SONG Shizhe

JIN Weixian

YIN Lihui

Related Institution

天津大学材料科学与工程学院

金属腐蚀与防护国家重点实验室

钢铁研究总院舟山海洋腐蚀研究所

⁰

Effect of MoO42- on underscale local corrosion of N80 steel in neutral solution

DOI：

摘要

Abstract

关键词

Keywords

references

Effect of MoO₄^2- on underscale local corrosion of N80 steel in neutral solution