Keawhan, C., Wongpanya, P., Witit-anun, N., & Songsiriritthigul, P. (2012). Corrosion behavior of AISI 4140 steel surface coated by physical vapor deposition. Journal of Metals, Materials and Minerals, 22(1). Retrieved from http://jmmm.material.chula.ac.th/index.php/jmmm/article/view/25