X80钢在酸性红壤模拟液及室外红壤中的腐蚀动力学规律及相关性分析

中国腐蚀与防护学报

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X80钢在酸性红壤模拟液及室外红壤中的腐蚀动力学规律及相关性分析

王帅星¹,杜楠¹,刘道新²,肖金华¹,邓丹萍¹

1. 南昌航空大学
2. 西北工业大学(腐蚀与防护研究室) ;西安市西北工业大学398信箱

Corrosion Dynamic Laws and the Relevance of X80 Steel in the Acidic Soil Simulated Solution and Outdoor Red Soil

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摘要: 通过腐蚀失重法、SEM、XRD等获得了X80钢在红壤模拟液中的腐蚀演变特征；同时，利用精密电阻法原位、连续监测了X80钢在南昌红壤中的长期腐蚀动力学规律；基于室内模拟液腐蚀和室外红壤暴露试验结果，评价了二者之间的相关性，建立了腐蚀寿命预测模型。结果表明，酸性红壤模拟液及南昌红壤中，X80钢的腐蚀失重量与腐蚀时间之间均符合幂函数变化规律（△W=Atn）。通过定性比较和灰关联法分析表明，室内模拟液腐蚀试验与室外红壤暴露试验在腐蚀动力学、腐蚀形貌及腐蚀产物组成上均具有良好的一致性；二者的腐蚀动力学关联度为0.6233。基于室内腐蚀试验建立的GM(1,1)灰色模型可以对室外红壤暴露试验结果进行一定程度的预测，相对误差小于20%。

关键词 ： X80钢, 腐蚀动力学, 红壤模拟液, 室外红壤, 灰关联分析

Abstract：The evolution characteristics of corrosion dynamic, morphology and products for X80 steel in acidic soil simulated solution were obtained by the weight loss test, SEM and XRD. Besides, the long-term corrosion dynamic law of X80 steel in Nanchang soil was monitored in-situ by using a precise electrical resistance (ER) test system. The relevance between the simulated corrosion experiment and the outdoor soil exposure test were evaluated by using qualitative comparative and grey quantitative analysis.The results show that the corrosion weight loss of X80 steel in the simulated solution as a function of exposure time could be calculated using power function (△W=Atn). In the outdoor red soil, the corrosion dynamic law of X80 steel was similar to that in the simulated solution. It had good relevance between the indoor corrosion experiment and the outdoor soil exposure test, regardless of the corrosion dynamic, corrosion morphology and the composition of corrosion products. The correlation in the corrosion dynamic was 0.6233, and the equivalent speedup of acidic soil simulated solution to actual red soil was about 22.8. Besides, GM(1,1) corrosion kinetic data prediction model had been established basing on indoor immersing experiment. After verification, the relative error of GM(1,1) prediction model was less than 20%, which indicated that GM(1,1) model could be used to predict the the outdoor soil exposure test result.

Key words： X80 steel corrosion dynamic acidic soil simulated solution Outdoor red soil grey quantitative analysis

收稿日期: 2017-11-22

ZTFLH:

TG179

基金资助:国家自然科学基金

通讯作者: 王帅星

Corresponding author: Shuaixing Wang

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引用本文:

王帅星杜楠刘道新肖金华邓丹萍. X80钢在酸性红壤模拟液及室外红壤中的腐蚀动力学规律及相关性分析[J]. 中国腐蚀与防护学报, .

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https://www.jcscp.org/CN/Y0/V/I/0

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