热腐蚀的盐溶机理及其局限性

本文综述了有关热腐蚀机理的研究成果,着重叙述目前仍被公认的盐溶机理模型的研究进展,包括Rapp-Goto准则和金属氧化物在熔融Na_2SO_4中溶解度的实验测试。并以实验事实为依据阐述了盐溶机理模型的局限性,提出热腐蚀是依电化学机制发展的观点,依此举例说明金属和合金的热腐蚀历程。

FLUXING MECHANISM OF HOT CORROSION AND ITS LIMITATION

The results of research on hot corrosion mechanisms are reviewed ,with emphasis on the progress in studies on fluxing mechanism which is still widely accepted today. The progress includes Rapp-Goto criterion and the establishment of solubilities of metal oxides in fused Na_2SO_4. In the meanwhile, the limitation of fluxing mechanism is discussed on the basis of experimental evidences. A tentative proposal is brought forth in this paper that the development of hot corrosion follows electrochemical mechanism. A attempt is made to illustrate with examples hot corrosion processes in terms of electrochemical mechanism.