A Comparative Study of Hydrogen-Induced Cracking Resistances of API 5L B and X52MS Carbon Steels

• Published in: International Journal of Corrosion Vol. 2018; no. 2018; pp. 1 - 7
• Main Authors: Acciari, Heloisa Andréa, de Paula, Leandro Jesus, de Oliveira, Mariana Cristina, Figueredo, Rodrigo Monzon, Codaro, Eduardo Norberto
• Format: Journal Article
• Language: English
• Published: Cairo, Egypt Hindawi Publishing Corporation 01.01.2018; Hindawi; Hindawi Limited; Wiley
• Subjects: Backup software; Carbon; Comparative analysis; Comparative literature; Corrosion; Corrosion (Chemistry); Corrosion products; Corrosion tests; Cracking (corrosion); Defects; Electron microscopy; Energy; Engineering; Failure analysis; Hydrogen; Hydrogen permeation; Laboratories; Low carbon steels; Microscopy; Natural gas; Pipelines; Pipes; Scanning electron microscopy; Scientific imaging; Solutions; Spectrometry; Spectroscopy; Steel; Steel corrosion; Structural steel; Thick films; X-ray diffraction
• ISSN: 1687-9325; 1687-9333
• DOI: 10.1155/2018/1604507

Susceptibility to hydrogen-induced cracking of API 5L B and X52MS low-carbon steels in NACE 177-A, 177-B, and 284-B solutions has been investigated by the present work. A metallographic analysis of these steels was performed before and after NACE TM0284 standard testing. Corrosion products were characterized by scanning electron microscopy and X-ray dispersive energy spectrometry, which were subsequently identified by X-ray diffraction. Thus it was found that pH directly affects the solubility of corrosion products and hydrogen permeation. Both steels showed generalized corrosion in solution 177-A, and a discontinuous film was formed on their surfaces in solution 177-B; however, only the API 5L B steel failed the HIC test and exhibited greater crack length ratio in solution 177-A. In solution 284-B whose pH is higher, the steels exhibited thick mackinawite films with no internal cracking.