Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Effect of Stress on the Polarization Characteristic of Al-brass

Al-황동의 분극특성에 미치는 응력의 영향

  • Lim, Uh-Joh (Department of Mechanical Engineering, Pukyong National University) ;
  • Jeong, Hae-Kyoo (Outfitting Design Department No.3, Hyundai Heavy Industry Company) ;
  • Sim, Kyong-Tae (Department of Mechanical Engineering, Graduate School, Pukyong National University)
  • 임우조 (부경대학교 기계공학과) ;
  • 정해규 (현대중공업 의장설계3부) ;
  • 심경태 (부경대학교 대학원 기계공학과)
  • Published : 2004.06.01
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Abstract

Al-brass is the raw material of mnufacturing tubes for heat exchanger of vessel where seawater is used to coolant because it has high level of heat coductivity and excellent mechanical properties and high level of corrosion resistance due to cuprous oxide($Cu_2O$) layer against seawater. However, damage of Al-brass tubes for heat exchanger of vessel is reported that local corrosion such as stress corrosion cracking occurred by synergism effect between mechanical factor and corrosion environment. In this study, to investigate on the effect of stress on the polarization characteristics of Al-brass. At the stress of 0% and 95% yield strength by constant displacement tester, in 3.5% NaCl + 0.1% $NH_4OH$ solution, the polarization tests were carried out. And thus open circuit potential, corrosion current density, anodic polarization, cyclic polarization and dezincification behavior of Al-brass are investigated.

Keywords

References

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