通过讨论当前常用的力学－化学耦合模型，用力学－化学耦合的激活体积模型研究外部载荷产生的应力对尘化腐蚀中碳扩散的影响。结果表明，拉应力促使碳元素的扩散，而压应力抑制其扩散。
Metal dusting corrosion is a disintegration of metallic materials, which is dependent on carbon activity and pressure of atmosphere, temperature of circumstance, alloying component and so on. Diffusion of carbon into metal such as Fe, Ni and Co and their alloys plays a key role, meanwhile, external loading is an important factor. A brief discussion about coupling models of mechanics-chemical is made in the present work. Activity volume model is used to investigate the influence of external force on carbon diffusion. The results show that tensile stress promotes diffusion of carbon into metal, while compressive stress restrains it into metal.
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