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08481 Potential Effect Over the Stress Corrosion Cracking Behavior of a X70 Microalloyed Pipeline Steel in Diluted NaHCO3 Solutions

Picture for 08481 Potential Effect Over the Stress Corrosion Cracking Behavior of a X70 Microalloyed Pipeline St
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Product Number: 51300-08481-SG
ISBN: 08481 2008 CP
Author: Islas Alvaro Torres, Gonzalez Rodriguez Gonzalo, Serna Barquera Sergio, and Jorge Uruchurtu Chavarin
Publication Date: 2008
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Studies were carried out to evaluate the stress corrosion cracking (SCC) behavior of a X-70 microalloyed pipeline steel, with different microstructures by means of the slow strain rate testing (SSRT) technique at 50 ºC. Tests solutions consisted of 0.1, 0.05, 0.01 and 0.005 M sodium bicarbonate (NaHCO3) with KCl, CaCl2 and MgSO4-7H2O additions. Different anodic and cathodic potentials were applied. Additionally, experiments using the SSRT technique but with pre-charged hydrogen samples and potentiodynamic curves at different sweep rates were also done to elucidate hydrogen effects in this type of steel. The results showed that the different microstructures in conjunction with the anodic applied potentials shift the cracking susceptibility of the steels evaluated.
Studies were carried out to evaluate the stress corrosion cracking (SCC) behavior of a X-70 microalloyed pipeline steel, with different microstructures by means of the slow strain rate testing (SSRT) technique at 50 ºC. Tests solutions consisted of 0.1, 0.05, 0.01 and 0.005 M sodium bicarbonate (NaHCO3) with KCl, CaCl2 and MgSO4-7H2O additions. Different anodic and cathodic potentials were applied. Additionally, experiments using the SSRT technique but with pre-charged hydrogen samples and potentiodynamic curves at different sweep rates were also done to elucidate hydrogen effects in this type of steel. The results showed that the different microstructures in conjunction with the anodic applied potentials shift the cracking susceptibility of the steels evaluated.
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