Corten-A耐候钢在模拟污染海洋大气环境中的加速腐蚀相关性研究

doi:10.11902/1005.4537.2019.229

中国腐蚀与防护学报

2019, Vol. 39

Issue (6): 519-526 DOI: 10.11902/1005.4537.2019.229

研究报告

本期目录 | 过刊浏览

Corten-A耐候钢在模拟污染海洋大气环境中的加速腐蚀相关性研究

冯亚丽¹,白子恒¹,陈利红¹,魏丹²,张东玖³,姚琼³,吴俊升¹,董超芳¹,肖葵¹(

)

1. 北京科技大学新材料技术研究院腐蚀与防护中心北京 100083
2. 中国科学技术学会服务中心北京 100081
3. 西昌卫星发射中心航天发射场可靠性技术重点实验室海口 571000

Correlation of Indoor Accelerated Corrosion with Outdoor Exposure for Corten-A Weathering Steel in Polluted Marine Atmospheric Environments

FENG Yali¹,BAI Ziheng¹,CHEN Lihong¹,WEI Dan²,ZHANG Dongjiu³,YAO Qiong³,WU Junsheng¹,DONG Chaofang¹,XIAO Kui¹(

)

1. Corrosion and Protection Center, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
2. Service Center for Societies, China Association for Science and Technology, Beijing 100081, China
3. Xichang Satelite Lauch Center Key Laboratory of Space Lauching Site Reliability Technology, Haikou 571000, China

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摘要:

采用周浸加速腐蚀实验模拟Corten-A耐候钢在青岛和万宁两种污染海洋大气环境中的腐蚀过程，通过失重法、SEM分析、X射线衍射、电化学测试及灰色关联分析等方法，研究Corten-A钢在模拟污染海洋大气环境下的腐蚀动力学、腐蚀形貌、腐蚀产物及室内外实验的相关性。结果表明：随着加速实验的模拟溶液中NaCl浓度的升高，Corten-A钢的腐蚀程度先增大后减小，NaCl浓度为5% (质量分数) 时，浸润液对Corten-A钢腐蚀作用最大；室内周浸加速实验结果与室外污染海洋大气环境中的实际腐蚀情况相关性较好；分别建立了Corten-A耐候钢在青岛和万宁污染海洋大气环境下的室内加速模型：T_QD=251.214 t^0.718，T_WN=217.498 t^0.719。

关键词 ： Corten-A钢, 加速实验, 污染海洋大气, 相关性, 加速模型

Abstract：

The corrosion behavior of Corten-A weathering steel in two polluted marine atmospheric environments at coastal cities Qingdao and Wanning was simulated by cyclic immersion accelerated test. The corrosion kinetics, corrosion morphology, corrosion products and the correlation between results acquired form the accelerated corrosion test and the outdoors exposure test were studied by weight-loss method, SEM technique, X-ray diffraction analysis, electrochemical measurement techniques and grey correlation analysis. The results showed that the corrosion degree of Corten-A steel increased first and then decreased with the increasing of NaCl concentration in the simulated solution, while the solution with 5% (mass fraction) NaCl presented the greatest corrosion effect on Corten-A steel. It follows that results of the indoor accelerated corrosion tests are well correlated with those of the outdoor exposure in natural marine atmospheric environments. Besides, models suitable to describe the corrosion process of Corten-A weathering steel in the simulated polluted marine atmospheric environments of Qingdao and Wanning were established respectively as: T_QD=251.214 t^0.718, T_WN=217.498 t^0.719.

Key words： Corten-A steel accelerated experiments polluted marine atmosphere correlation acceleration model

收稿日期: 2019-04-04

ZTFLH:

TG172.3

基金资助:国家重点研发计划(2017YFB0304602)

通讯作者: 肖葵 E-mail: xiaokui@ustb.edu.cn

Corresponding author: Kui XIAO E-mail: xiaokui@ustb.edu.cn

作者简介: 冯亚丽，女，1995年生，硕士生

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	冯亚丽
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引用本文:

冯亚丽,白子恒,陈利红,魏丹,张东玖,姚琼,吴俊升,董超芳,肖葵. Corten-A耐候钢在模拟污染海洋大气环境中的加速腐蚀相关性研究[J]. 中国腐蚀与防护学报, 2019, 39(6): 519-526.
Yali FENG, Ziheng BAI, Lihong CHEN, Dan WEI, Dongjiu ZHANG, Qiong YAO, Junsheng WU, Chaofang DONG, Kui XIAO. Correlation of Indoor Accelerated Corrosion with Outdoor Exposure for Corten-A Weathering Steel in Polluted Marine Atmospheric Environments. Journal of Chinese Society for Corrosion and protection, 2019, 39(6): 519-526.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2019.229 或 https://www.jcscp.org/CN/Y2019/V39/I6/519

图1 试样在不同浓度模拟溶液中的周浸实验失重拟合曲线

表1 拟合曲线参数

图2 试样在不同NaCl配比溶液中实验不同周期后的微观腐蚀形貌

图3 试样在3.5%NaCl+NaHSO3溶液中周浸实验96和360 h后腐蚀产物XRD图谱

图4 试样在不同溶液中的极化曲线

表2 青岛地区腐蚀失重量统计 (mass loss / (g·m-2))

表3 万宁地区腐蚀失重量统计 (mass loss / (g·m-2))

表4 青岛地区腐蚀失重数据预处理结果

表5 万宁地区腐蚀失重数据预处理结果

表6 青岛地区腐蚀失重的绝对差

表7 万宁地区腐蚀失重的绝对差

表8 室内外实验的灰色关联度

图5 不同NaCl模拟溶液与青岛海洋大气的灰色关联度和加速比

图6 不同NaCl模拟溶液与万宁海洋大气的灰色关联度和加速比

表9 预测模型所得Corten-A钢在青岛和万宁的室内加速实验时间

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