Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (52권4호 187-193)

Characterization of the Morphology and Corrosion Resistance in Electroless Ni-P-TiO2 Composite Coating Prepared by TiO2 Contents

TiO2 함량에 따르는 무전해 Ni-P-TiO2 복합도금층 특성 연구

변영민;김호영;이재웅;황환일;
Byoun, Young-Min;Kim, Ho-Young;lee, Jae-Woong;Hwang, Hwan-il;

한국건설생활환경시험연구원;인하대학교 금속재료공정공학과;한국폴리텍대학;
Metal& Machinery Team, Korea Conformity Laboratories (KCL);Dept. of Metal.Material Process Engineering, College of Engineering, Inha University;KOREA POLYTECHNICS;

DOI : 10.5695/JKISE.2019.52.4.187

Abstract

Electroless Ni-P coatings are widely used in the chemical, mechanical, and electronic industries because of their excellent wear and abrasion resistance. In this study, the effect of $TiO_2$ particles of composite coating was investigated. To improve the corrosion resistance, electroless $Ni-P-TiO_2$composite coating was studied by varying the $TiO_2$ content. The morphology and phase structure of $Ni-P-TiO_2$ composite coatings were analyzed by scanning electron microscopy(SEM), X-ray diffractometry(XRD) and X-ray photoelectron spectroscopy(XPS). The result showed that $Ni-P-TiO_2$composite coating is composed of Ni, P, Ti and O. It exhibits an amorphous structure, high hardness and good corrosion resistance to the substrate. $Ni-P-TiO_2$ composite coatings have higher open circuit potential than that of the substrate, which obtained at $TiO_2$ content of 5.0 g/L optimal integrated properties.

Keywords

Titanium dioxide;Electroless deposition;Ni-P;Composite;Harness;Morphology;Corrosion Resistance;