M.Sc Tezi Görüntüleme

Student:	Yasin ALEMDAĞ
Supervisor:	Prof.Dr. Temel SAVAŞKAN
Department:	Mechanical Engineering
Institution:	Graduate School of Natural and Applied Sciences
University:	Karadeniz Technical University, Turkey

Title of the Thesis:	THE EFFECTS OF TEMPERATURE AND CURRENT DENSITY ON THE STRUCTURE AND PROREPERTIES OF HARD AND DECORATIVE CHROMIUM PLATINGS
Level:	M.Sc
Acceptance Date:	1/1/2000
Number of Pages:	48
Registration Number:	i1084

Summary:

In this study, the effects of bath temperature and current density on the structure and the properties of hard and decorative chromium plating made on TS Fe37 steel parts were studied. The corrosion behaviour of the electroplated and unplated samples were compared.

It was found that the rate of deposition in both hard and decorative chromium platings decreased with increasing bath temperature, but increased with increasing current density. In general, fine grain structure was obtained by hard chromium plating and the grain size of the platings was found to be almost independent of bath temperature and current density. It was observed that the grain size of the decorative chromium plating was not affected by temperature, but decreased with increasing current density. It was also found that the hardness of both hard and decorative platings decreased with increasing bath temperature, but increased with increasing current density.

The chromium plated samples were found to be more corrosion resistant than the unplated samples in %1 HCl aqueous solution. However, the corrosion resistance of the decorative chromium platings was found to be much superiour to that of hard chromium platings and unplated samples.

Keywords : Hard and Decorative Chromium Plating, Rate of Chromium Plating, Properties of Chromium Platings.