Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Characterization of Tribology for Automobile Part of Manganese Phosphate Solution with Addition agent

자동차 부품 Tribology용 인산-망간 화성처리에 있어서 첨가제에 따른 화성피막 특성

  • Byoun, Young-Min (Dept. of Metallurgical Engineering, College of Engineering, Inha University) ;
  • Park, Jong-Kyu (Dept. of Metallurgical Engineering, College of Engineering, Inha University) ;
  • Seo, Sun-Kyo (Sam Young Chemical) ;
  • Lee, Chi-Hwan (Dept. of Metallurgical Engineering, College of Engineering, Inha University)
  • Received : 2015.03.04
  • Accepted : 2015.03.30
  • Published : 2015.04.30
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Abstract

In this study, the wear performance of manganese phosphate coating on SM45C with addition agent of Tartaric acid and Citric acid were investigated. The Surface morphology of manganese phosphate coating was examined by Scanning Electron Microscope (SEM) and Energy Dispersive X-ray spectroscopy (EDS). It is found that Mn, P, Fe, O and C. The crystal structure and thee composition was analysis and determined by using XRD. The XRD results indicated that manganese phosphate coatings are mainly composed of $(Mn,Fe)_5H_2(PO_4)_44H_2O$ and consists of a lot of close packed lump crystalline. Based on the time dependence of morphology and the weight of manganese phosphate coating, it shows that the phosphating process mainly includes three stages: corrosion of the substrate, creation and growth of phosphate crystal nucleus and thickening of manganese phosphate coating. The wear tests were performed in a ball on disc apparatus as per ASTM G-99 Standard. It was showed that the initial wear was quite high followed by low sludge.

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