碳钢、低合金钢大气腐蚀数学模型研究  

Rrsearch on mathematical model of carbon steel and low alloy steel in atmosphere

作　　者：王景茹[1] 张峥[1] 朱立群[1] 钟群鹏[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院,北京100083

出　　处：《航空材料学报》2004年第1期41-46,共6页Journal of Aeronautical Materials

基　　金：国家重点基础研究发展规划资助项目(G1999065010)

摘　　要：通过对碳钢、低合金钢长期大气腐蚀锈层生长历程的研究,利用Fick扩散定律,给出了碳钢、低合金钢大气腐蚀的数学模型。然后,用碳钢、低合金钢自然环境下暴露1,2,4,8,16年的腐蚀深度数据进行了验证,提出了碳钢、低合金钢腐蚀分为三个阶段的复合模型,并分别预测了三个阶段的腐蚀规律。第一阶段用线性规律比较合适;第二阶段采用了数学模型中的抛物线规律,拟合结果表明抛物线拟合精度高于传统的幂函数拟合的精度;第三阶段也用线性规律。Research on long-term corrosion mechanism of carbon steel and low alloy steel, with the fick diffusion law, the mathematical model of atmospheric corrosion of carbon steel and low alloy steel is presented. The model is proved by using corrosion data of carbon steel and low alloy steel exposed 1,2,4,8 and 16 years in natural environment, and putting forward the complex model of three stages of corrosion of carbon steel and low alloy steel, and forecasting the corrosion law of three stages respectively. The first stage exhibits the linear function; the second stage exhibits the parabola function, the result of regression indicates that parabola function is more accurate than power function; the third stage exhibits the linear function as well.

关 键 词：碳钢 低合金钢 大气腐蚀 数学模型 抛物线规律 

分 类 号：TG178[金属学及工艺—金属表面处理] TG172.3[金属学及工艺—金属学]