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Susceptibility of 316L stainless steel to crevice corrosion in submersible solenoid valve / B. P. Cai in Materials and corrosion, Vol. 62 N° 8 (Août 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 8 (Août 2011) . - pp. 753-759 Titre : Susceptibility of 316L stainless steel to crevice corrosion in submersible solenoid valve Type de document : texte imprimé Auteurs : B. P. Cai, Auteur ; Y. H. Liu, Auteur ; X. J. Tian, Auteur Année de publication : 2011 Article en page(s) : pp. 753-759 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : AFM  Crevice  corrosion  SEM  Stainless  steel Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The susceptibility of 316L stainless steel to crevice corrosion was investigated by using immersion test and electrochemical test. Three kinds of crevices including 316L-to-polytetrafluoroethylene (PTFE) crevice, 316L-to-fluoroelastomeric (FKM) crevice and 316L-to-316L crevice were tested in artificial seawater at 50°C. The results indicate that 316L stainless steel specimen is the most susceptible to crevice corrosion when it is coupled to 316L stainless steel crevice former, while it is the least susceptible when it is coupled to FKM crevice former. It suggests that during submersible solenoid valve design, the crevice of metal-to-metal should be moderately large so that crevice corrosion can not initiate and propagate, and FKM O-ring rather than PTFE O-ring should be selected as obturating ring. The corroded surface morphology was investigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Three regions including passive region, active region and variable region can be observed on crevice corrosion sites. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005917/abstract [article] Susceptibility of 316L stainless steel to crevice corrosion in submersible solenoid valve [texte imprimé] / B. P. Cai, Auteur ; Y. H. Liu, Auteur ; X. J. Tian, Auteur . - 2011 . - pp. 753-759. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 8 (Août 2011) . - pp. 753-759 Mots-clés : AFM  Crevice  corrosion  SEM  Stainless  steel Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The susceptibility of 316L stainless steel to crevice corrosion was investigated by using immersion test and electrochemical test. Three kinds of crevices including 316L-to-polytetrafluoroethylene (PTFE) crevice, 316L-to-fluoroelastomeric (FKM) crevice and 316L-to-316L crevice were tested in artificial seawater at 50°C. The results indicate that 316L stainless steel specimen is the most susceptible to crevice corrosion when it is coupled to 316L stainless steel crevice former, while it is the least susceptible when it is coupled to FKM crevice former. It suggests that during submersible solenoid valve design, the crevice of metal-to-metal should be moderately large so that crevice corrosion can not initiate and propagate, and FKM O-ring rather than PTFE O-ring should be selected as obturating ring. The corroded surface morphology was investigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Three regions including passive region, active region and variable region can be observed on crevice corrosion sites. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005917/abstract