Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
권호 표지

Effect Mo Addition on Corrosion Property and Sulfide Stress Cracking Susceptibility of High Strength Low Alloy Steels

  • Lee, Woo Yong (Pohang University of Science and Technology, Department of Materials Science and Engineering) ;
  • Koh, Seong Ung (Pohang University of Science and Technology, Department of Materials Science and Engineering) ;
  • Kim, Kyoo Young (Pohang University of Science and Technology, Department of Materials Science and Engineering)
  • Published : 2005.04.01
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Abstract

The purpose of this work is to understand the effect of Mo addition on SSC susceptibility of high strength low alloy steels in terms of microstructure and corrosion property. Materials used in this study are high strength low alloy (HSLA) steels with carbon content of 0.04wt% and Mo content varying from 0.1 to 0.3wt%. The corrosion property of steels was evaluated by immersion test in NACE-TM01-77 solution A and by analyzing the growth behavior of surface corrosion products. SSC resistance of steels was evaluated using constant load test. Electrochemical test was performed to investigate initial corrosion rate. Addition of Mo increased corrosion rate of steels by enhancing the porosity of surface corrosion products. However, corrosion rate was not directly related to SSC susceptibility of steels.

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