Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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The Effect of Compressive Residual Stress of Spring Steel for Vehicle on Corrosion

차량용 스프링강재의 압축잔류응력이 부식에 미치는 영향

  • Park Keyungdong (Department of Mechanical Engineering, Pukyoung National University) ;
  • An Jaepil (Department of Mechanical Engineering, Pukyoung National University)
  • 박경동 (부경대학교 기계공학부) ;
  • 안재필 (부경대학교 기계공학부)
  • Published : 2005.01.01
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Abstract

Shot peening can be defined as the process of work hardening of the surface of components by means of propelled stream of spherical shot. Benefits due to shot peening are increase in resistance to fatigue, stress corrosion cracking, fretting, galling, erosion and closing of pores. In this study, the influence of shot peening on the corrosion was investigated on spring steel immersed in $3.5\%\;NaCl$. The immersion test was performed on the two kinds of specimens. Corrosion potential, polarization curve, residual stress and etc. were investigated from experimental results. From test results, the effect of shot peening on the corrosion was evaluated. The important results of the experimental study on the effects of shot peened spring steels on the environment corrosion are as follows; In case of corrosion potential, shot peened specimen shows more activated negative direction as compared with parent metal. Surface of specimen, which is treated with the shot peened, is placed as more activated state against inner base metal. It can cause the anti-corrosion effect on the base metal.

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References

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