Prevention of Hydrogen Damage

1 Corrosion Testing Objectives of SCC testing are (i) determination of the risk of SCC for a given application and comparison of alloys (ii) examination of the effects of chemical composition, metallurgical processing, fabrication practices for structural components (iii) evaluation of protective systems and prediction of service life (iv) development of new alloys, which are less expensive, and offer a longer, safer, and efficient performance for chosen environments (v) evaluation of claims for SCC performance of improved mill products. 

Prediction of corrosion performance can be done from published data and testing. Accelerated testing should involve the same mode of failure and reflect a known order of resistance of some alloys in service media (128). The common test objectives of SCC are high stresses, slow continuous straining, precracked specimens, higher concentration of corrosive agent than in service medium, higher temperature, and electrochemical stimulation (129). For electrochemical corrosion, the properties of the medium at the interface should be noted in accelerated tests. 

2 Media Considerations SCC tests are conducted in (i) natural atmospheres (ii) seawater immersion, and (iii) laboratory or other fabrication conditions. Atmospheric exposure tests take a long exposure time, but are reliable as they 

Constant load SCC tests are more severe than constant deflection tests. 

LL Shreir, RA Jarman, GT Burstein (eds.). Principles of Corrosion and Oxidation. But-terworth Heinemann, 1994. 

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Prevention of Hydrogen Damage involves the following metallurgical considerations ... 

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