Journal ArticleDOI
Hydrogen embrittlement properties of heat affected zone of high strength steel in shielded metal arc welding
Seong-Jong Kim,Kyung-Man Moon +1 more
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TLDR
In this article, the slow strain rate test (SSRT) method with applied constant cathodic potential was used to analyze the fracture surface of a femtosecond femtore.Abstract:
Corrosion resistance, mechanical properties and hydrogen embrittlement were investigated from an electrochemical view, with the slow strain rate test (SSRT) method with applied constant cathodic potential. Fracture surface was analyzed by SEM. Corrosion resistance and mechanical properties were increased by post-weld heat treatment (PWHT) compared to those in the as-welded condition. Elongation and time-to-fracture were decreased with shifting cathodic polarization potential to the low potential direction. On analysis of SEM fractography, the quasi-cleavage (Q.C) fracture mode was also observed with an increase of susceptibility to hydrogen embrittlement. At the applied cathodic potential between −770 mV and −875 mV (SCE; saturated calomel electrode), the fracture morphology was of the dimple pattern with ductile fracture, while it changed to the transgranular pattern at under −900 mV (SCE). Eventually it is suggested that an optimum cathodic protection potential range was from −770 mV to −875 mV (SCE) without regard to PWHT condition.read more
Citations
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Journal ArticleDOI
Electrochemical study of hydrogen embrittlement and optimum cathodic protection potential of welded high strength Steel
TL;DR: In this paper, the slow strain rate test (SSRT) method with an applied constant cathodic potential was used to investigate the electrical properties and mechanical properties of welded high strength steel.
Journal ArticleDOI
Evaluation of the characteristics using slow strain rate tests of 5456 Al-Mg alloy for ship construction
TL;DR: In this article, the authors investigated the mechanical and electrochemical properties of aluminum alloys using slow strain rate and potentiostatic tests under various potential conditions and determined the optimum protection potential range with regards to hydrogen embrittlement and stress corrosion cracking was determined to lie between −1.5 and −0.7 V (SSCE).
Journal ArticleDOI
Electrochemical characteristics of stainless steel using impressed current cathodic protection in seawater
TL;DR: Tafel analysis showed that STS 316 was the most noble in the three types of stainless steels as mentioned in this paper, while STS 304 had the lowest current densities in all potential ranges, and STS 630 had the highest.
Journal ArticleDOI
Electrochemical characteristics of Al-Mg alloy in seawater for leisure ship: Stress corrosion cracking and hydrogen embrittlement
TL;DR: In this article, the authors investigated the mechanical and electrochemical properties of aluminum alloys and found that the current density in the first passivity range had a similar value as that for concentration polarization by dissolved oxygen during the application of cathodic protection.
Journal ArticleDOI
Evaluating the Electrochemical Properties in the Protection Potential of Material for Use in Al Vessels in Seawater
TL;DR: In this paper, the current density of 7075 Al alloy increases linearly with an increase in potential during anodic polarization, which implies that no passivation of this alloy occurs.
References
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Book
Principles and prevention of corrosion
TL;DR: In this article, the technology and evaluation of Corrosion is presented, with a focus on the effects of Metallurgical Structure on Corrosions, and a discussion of materials selection and design.
Journal ArticleDOI
Hydrogen-induced cracking in 4340-type steel: Effects of composition, yield strength, and H2 pressure
TL;DR: In this article, the threshold stress intensity for hydrogen-induced crack extension at room temperature was made on bolt-loaded WOL specimens of a commercial 4340 steel and of laboratory heats in which the bulk concentrations of manganese, silicon, phosphorus, and sulfur were varied.
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