对不同喷丸工艺的铁镍基800合金在300℃ 、50%NaOH溶液中的应力腐蚀行为进行了比较。研究了喷丸改善应力腐蚀的原因。用AES、XPS等测量手段分析了腐蚀3000h仍未发生应力开裂的样品表面生成的多层惰性膜的化学成分及价态组成，并探讨了苛性碱中多层腐蚀膜生成的原因。
The autoclave experiments were applied to investigate stress corrosion cracking(SCC) behaviors of alloy 800 under different shot peening conditions in 300℃ ,50mass% NaOH solution. The effect of shot peening was discussed either. The final passive films developed on the alloys which have no SCC after 3000 hours in solution were studied by Auger electro spectroscopy and X-ray photoelectron spectroscopy. The results showed that shot peeing creates a compressive residual stress over the alloy surface and could protect against stress corrosion cracking effectively. XPS results showed that the films formed on alloy surface have a trilayered structure in which the topmost layer is composed of pure nickel, followed by an outer part of carbolic grains and an inner part of Cr2O3 and a little nickel oxide. Because the topmost nickel disappearedin protective layer and the circumstance became execrable the corrosion proceeds.
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