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从位错和能量的观点出发,分析了畸变原子和普通原子间的能量差别,结果表明:位错原子的电动势比普通原子的电动势高出大约2.1V,溶解速率是普通原子的10~(17)倍。提出了金属裸表面溶解的模型。理论计算得到了裸体表面溶解电流和位错密度的关系。利用自行设计制作的快速划破装置测试了不同应力应变状态下321不锈钢单晶体在3.5％MgCl_2水溶液中裸体表面溶解电流。实验结果与理论计算结果相一致。
From the viewpoint of dislocation and energy, the energy difference between distorted atoms and ordinary atoms is analyzed. The results show that the electromotive force of dislocation atoms is about 2.1V higher than that of ordinary atoms, and the dissolution rate is 10 ~ (17) ) Times. A model of metal bare surface dissolution is proposed. The relationship between nude surface dissolution current and dislocation density has been calculated theoretically. The dissolution kinetics of 321 stainless steel single crystals in 3.5% MgCl 2 aqueous solution under different stress and strain conditions was tested by the rapid cutting device designed by ourselves. The experimental results are consistent with the theoretical calculation results.