(english) A thin film of phosphate pretreatment applied to a steel surface (bare or zinc coated) to enhance paintability. ภาษาไทย ภาษาอังกฤษ Bonderized Coating 0 0 ภาพประกอบ (english) A thin film of phosphate pretreatment applied to a steel surface (bare or zinc coated) to enhance paintability.