Developing prepitting procedure for near neutral pH stress corrosion crack initiation studies on X-52 pipeline steel

Developing prepitting procedure for near neutral pH stress corrosion crack initiation studies on X-52 pipeline steel

Type	Journal Article
Author	Z. Shirband
Author	R. L. Eadie
URL	http://www.maneyonline.com/doi/abs/10.1179/1743278215Y.0000000019
Volume	50
Issue	3
Pages	196-202
Publication	Corrosion Engineering, Science and Technology
Date	April 21, 2015
Abstract	Authors present a procedure for prepitting of pipeline X-52 steel in the bicarbonate/carbonate solution. Researchers added sodium chloride to the solution to induce pitting, and determined the optimum concentration of chloride ions, which produced a low density of pits. The procedure included prepassivation of the steel in the solution with optimum concentration of chloride ions, followed by an increase in the potential above the pitting potential to generate pits. The potential was then stepped back well below the pitting potential to grow the pits to the desirable depth. The procedure can be used to generate pits on tensile specimens, which can be subsequently employed in near neutral pH stress corrosion crack initiation studies, which can result in shorter duration of crack initiation experiments under real loading condition.