Stress corrosion cracking metallurgy

Coupon tests involved a number of metallurgies and were done to evaluate precipitator-plate alloys. Test stainless steel plates failed, not only because of pitting but also because stress-corrosion cracks developed. 

Other examples of metallurgy decisions are red brass versus admiralty tubes with fresh water on the tubeside and suspected stress corrosion cracking conditions on the shellside, and stainless steel versus carbon steel with chlorides present. A good metallurgist should be brought in when these kinds of decisions are needed. 

Stress Corrosion Cracking and Embrittlement (Electrochem. Soc. Symposium), Ed. Robertson, W. D., Wiley, New York (1956) Physical Metallurgy of Stress-Corrosion Fracture (A.I.M.E. Symposium), Ed. Rhodin, T. N., Imerscience, New York (1959) ... 

Duquette, D. J., Fundamentals of corrosion fatigue behaviour of metals and alloys , in Proc. Conf. Hydrogen Embrittlement and Stress Corrosion Cracking, Cleveland, Ohio, 1-3 June 1980, Case Western Reserve University Department of Metallurgy and Materials Science, pp. 249-70 (1980)... 

Stress corrosion cracking is a complicated subject. Unless that is emphasized at the beginning, then the fine details of phenomenological and mechanistic factors will not be appreciated. In order to gain some understanding of stress corrosion cracking, it is necessary to realize that three different disciplines are at work in any stress corrosion situation. These are physical metallurgy, electrochemistry and fracture mechanics. 

Figure 5.70 Chloride stress corrosion cracking in stainless steel. (Figure originally published in Reference 26. Reproduced with permission of the Canadian Institute of Mining, Metallurgy and Petroleum, www.cim.org.)...

Atomic surface mobility model Metallurgy of Stress Corrosion Cracking... 

Copson, H. R., Physical Metallurgy of Stress Corrosion Cracking, Intersdence, New York, 247 (1959)... 

Several testable models for stress-corrosion cracking (SCC) of metals are discussed in terms of the main experimental variables stress, metallurgy, and environment. Slip-dissolution, film-induced cleavage, and hydrogen embrittlement models are all shown to be consistent with experimental data in particular systems. Other models that cite effects of corrosion (without a film) or adsorption on crack tip deformation, leading to microcleavage or plastic microfracture, are less easy to test. No model can be universal in view of the demonstrable multiplicity of mechanisms. In many cases the atomistic mechanism is unknown, yet cracking can be controlled or predicted via the localized corrosion process that precedes SCC. 

Influence of Chemicals—Environmental Stress Cracking. In metallurgy, corrosive stress cracking is the simultaneous interaction of a certain... 

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