The Characterization of Film on Alloy 800 After Shot Peening in Aqueous Alkali by Using XPS

J Chin Soc Corr Pro

2004, Vol. 24

Issue (4): 213-217 DOI:

Research Report

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The Characterization of Film on Alloy 800 After Shot Peening in Aqueous Alkali by Using XPS

Xiaoming Zhu

南京大学物理系2000硕 210093

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Abstract 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.

Key words: shot peening alloy 800 stress corrosion X-ray photoelectron spectroscopy

Received: 21 October 2001

ZTFLH:

TG174.44

Corresponding Authors: Xiaoming Zhu

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Xiaoming Zhu. The Characterization of Film on Alloy 800 After Shot Peening in Aqueous Alkali by Using XPS. J Chin Soc Corr Pro, 2004, 24(4): 213-217 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2004/V24/I4/213

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