ISO 9223—2012标准碳钢大气腐蚀速率预测方程在我国典型地区的适用性研究

摘要

Objective To verify the applicability of the prediction equation for atmospheric corrosion rate of carbon steel in ISO 9223—2012.Methods Based on the atmospheric corrosion data of environmental data of carbon steel in typ-ical coastal areas, saline areas and industrial polluted areas in China, the difference between predicted and measured val-ues of atmospheric corrosion rate of carbon steel was analyzed to verify the applicability of the prediction equation for atmospheric corrosion rate of carbon steel in ISO 9223—2012 in China.Results According to the prediction equation for atmospheric corrosion rate of carbon steel in ISO 9223—2012, temperature, relative humidity, SO2 deposition and Cl-deposition of four environmental factors data were used to predict the atmospheric corrosion of carbon steel. The pre-diction effect in 12 typical areas in China was good.R2 reached 0.90, and the corrosion grade divided according to the predicted value was consistent with the measured value.Conclusion The atmospheric corrosion rate prediction equation for carbon steel in ISO 9223—2012 is applicable to the atmospheric environment in China. The data of chloride deposi-tion rate in the prediction equation can be obtained by the dry plate method.%目的 对ISO 9223—2012标准中碳钢大气腐蚀速率预测方程在我国的适用性进行验证.方法 利用我国典型沿海地区、盐渍区、工业污染区的碳钢大气腐蚀数据和同期环境数据,分析碳钢大气腐蚀速率预测值和实测值之间的差异,验证ISO 9223—2012标准碳钢大气腐蚀速率预测方程在我国的适用性.结果 根据ISO 9223—2012标准碳钢大气腐蚀速率预测方程,利用气温、相对湿度、二氧化硫沉积速率、氯离子沉积速率四项环境因素数据预测碳钢第一年大气腐蚀速率,在我国12个典型地区的预测效果较好,R2达到0.90.根据预测值划分的腐蚀等级与实测值划分结果一致性好.结论 ISO 9223—2012标准碳钢大气腐蚀速率预测方程适用于我国大气环境,预测方程中氯离子沉积速率数据可以直接采用挂片法数据.