Study on various types of antirust to prevent corrosion on heat sink terminal

Nowadays, electronics manufacturing industries are rapidly developing. Most of
electronics used copper based board to mount small electronic components. Due to
continuous current flow, copper board temperature increases. Heat transfer devices
need to be mounted on that board to sink the excess heat from the board to improve
the performance. This study is focusing on the corrosion prevention of heat sink
terminal surface by using antirust coatings. Heat sink terminal which generally made
of steel easily get corroded when exposed to environment. In this project, heat sink
sample is made of Eco-Trio steel (or known as ZSNC steel), one of the Nippon Steel
product. Heat sink manufacturer basically used steel terminal to reduce cost compare
to other materials. However, using steel as terminal creates other problem to
manufacturer which is corrosion or commonly called rust. This rusty terminal will
resist any solder liquid, which means, heat sink terminal will not perfectly banded
together to the copper board. Rust is critical problem in electronic manufacturing
industries because it has potential to stop production line for substantial duration if no
action taken to prevent this problem. The literature review has been divided into three
parts which are study on corrosion, heat sink and antirust coatings. Several organic
coatings have been selected for the study. The scope of study also includes the data
weathering experiment which is important in simulating the similar condition for
ageing process of coated samples. Besides, a few ISO Standards has been studied to
guide the coating experiment to ensure the reliability of experiment conducted. Six
methods has been suggested for this project include the research part, information
gathering from journals and books, test procedure preparation and samples
purchasing, coating process, manual and solder dip process and optimum antirust
coating selection. Finally, this project should be a useful addition in order to
understand the corrosion on heat sink terminal and its prevention by using antirust
coatings. Hence, the outcome of this project should give benefits for all of the parties
involved; particularly the student himself.