Abstract
Springs used for a car require a long term performance in severe corrosive environments such as the salt damage. In late years the use of Nano-Indentation method is prosperous in the hard film measurement used for a semiconductor device or electronic parts, but there are few examples applied to a soft film such as the coating film. In this article, focusing on Nano-Indentation method as one of the methods to evaluate coating film quantitatively, I evaluated properties of matter of the coating film for springs.
