Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403


공학

한국표면공학회지 (25권2호 82-89)

Corrosion Behavior of TiN Ion Plated Steel Plate(II)-Effects of Ni and Ni/Ti interlayers-

TiN 이온 플레이팅한 강판의 내식성에 관한 연구 (II)-Ni 및 Ni-Ti 하지코팅의 영향-

한전건;연윤모;홍준희;
;;;

성균관대학교 금속공학과;수원전문대학 용접과;범진금속화학연구소;
성균관대학교 금속공학과;수원전문대학 용접과;범진금속화학연구소;

Abstract

The effect of interlayer coating of Ni and Ti on corrosion behavior was studied in TiN ion plated steel plate. Interlayer coating was carried out in a single and bi-layer to a various thickness combination prior to final TiN coating of $2mu extrm{m}$. Corrosion behavior was evaluated by anodic polarization test in 1N H2SO4 as well as salt spray test. Porosity of each coating was also tested by using SO2 test. Corrosion resistance was improved with increasing the thickness of Ni interlayer coating and Ni-Ti interlayer coating markedly enhanced the corrosion resistance. Ni/Ti interlayer coating of $2mu extrm{m}$/2$mu extrm{m}$ prior to $2mu extrm{m}$ TiN coating decreased the corrosion current density of active range by an order of 4 and that of passive range by an order of 1. This improvement was associated with the retardation of corrosive agent penetration with increasing coating thickness and inherent corrosion resistance of Ni and Ti interlayers, Ni/Ti interlayers coating were also very effective in improvement of corrosion resistance under salt atmosphere.

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