STEEL SHEET AND AUTOMOBILE COMPONENT

• Main Authors: KOGA ATSUO, UEDA KOHEI, UEDA DAICHI
• Format: Patent
• Language: English; Japanese
• Published: 12.10.2023
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; PERFORMING OPERATIONS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING

To provide a steel sheet having corrosion resistance and excellent electrocoating property, and an automobile component utilizing the same.SOLUTION: Provided is a steel sheet comprising a plated base steel sheet with a zinc-based plating layer provided on at least one side, and an organic coating provided on the zinc-based plating layer, wherein the plated base steel sheet has an arithmetic mean roughness Ra of 0.5 to 2.3 μm, the number of peaks per inch PPI (peak per inch) is 30 to 150, a thickness of the organic film is 0.3 to 2.1 μm and is smaller than the arithmetic average roughness Ra of the plated base steel sheet, and automobile parts using the same.SELECTED DRAWING: None 【課題】耐食性と共に、優れた電着塗装性を有する鋼板、及びそれを利用した自動車部品を提供すること。【解決手段】亜鉛系めっき層が少なくとも片面に設けられためっき母鋼板と、前記亜鉛系めっき層上に設けられた有機皮膜と、を有する鋼板であって、前記めっき母鋼板の、算術平均粗さＲａが０．５～２．３μｍであり、１インチ当りの山数ＰＰＩ（ｐｅａｋ ｐｅｒ ｉｎｃｈ）が３０～１５０であり、前記有機皮膜の厚みが、０．３～２．１μｍであり、かつ前記めっき母鋼板の算術平均粗さＲａよりも小さい、鋼板及びそれを利用した自動車部品。【選択図】なし