The stress corrosion cracking (SCC) behavior of API 5L-X52 low carbon steel has been studied in a presence of different soil solutions, including synthetic NS4 solutions, with and without barrier coatings using slow strain rate tests (SSRT). The coatings used were a multiple layer system (polyethylene, asphalt resin and epoxy resin) and FBE (fusion bonding epoxy). Results from this study indicate that API 5L-X52 is not susceptible to SCC in soils and NS4 solutions at open corrosion potentials when the FBE and the three layer (3-L) coating were used. However, there is some indication of embrittlement and shows susceptibility at - 1.0 V vs. SCE applied potentials with for the 3-L system in NS4 soil solution and FBE in both environment.

Subject
Low carbon steel, Scanning electron microscopy, Steel surfaces, Water, Materials, Fusion bonded epoxy coating, Surface preparation, Solutions, Mechanical failure, Risk reduction, Fracture, Soil, Stress corrosion cracking
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2003
GOV
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