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http://dx.doi.org/10.5228/KSTP.2012.21.5.330

A Study on the Characteristics of Salt Spray Test of Roll Formed and Zn-Ni Electrodeposited Steel Bolts  

Hamrakulov, B. (금오공과대학교 신소재시스템공학부)
Son, Y.H. (영신금속공업(주))
Kim, I. (금오공과대학교 신소재시스템공학부)
Publication Information
Transactions of Materials Processing / v.21, no.5, 2012 , pp. 330-335 More about this Journal
Abstract
Roll formed steel bolts are electrodeposited with Zn-Ni to protect themselves from corrosion. However, white storage stain or white rust(corrosion) is found on Zn-Ni electrodeposited surface of steel bolts when they are exposed to moisture. In this paper a new process is introduced to protect Zn-Ni electrodeposited steel bolt from white storage stain or white rust for a long time under the salt spray test and high humidity test conditions. The better corrosion resistance could be gotten by the additional process of Ni-P electroless deposition and heat treatment to conventional manufacturing method of Zn-Ni coated steel bolt. The corrosion resistance of Zn-Al powder slurry coated steel bolt showed better than that of Zn-Ni electrodeposited one.
Keywords
Roll Formed; Bolt; White Storage Stain; White Rust; Zn-Ni Electrodeposion; Electroless Deposition; Salt Spray Test;
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