The previous reported that a high coefficient of friction could be obtained by applying phosphate treatment to zinc galvanized coatings. However, it cannot be said that practicability and quality problems in actually practicing the method have been fully examined and cleared. Therefore, in this study, problems in possible processes to be taken and in quality were further investigated. The results showed that the phosphate treatment was a puctical and highly reliable process and thus its practical use could be concluded to be no problem.
