Black coating formed vehicle components and / or fastening components and manufacturing method thereof

By a simple process, and it aims to provide a technique capable of forming a coating having the appearance and high corrosion resistance with a deep blackness on galvanized parts, the metal substrate surface zinc-plated, trivalent chromium It was treated with black conversion treatment agent comprising as an active ingredient to form the black conversion coating to L value (lightness) no 33 30, then the said black chemical conversion on film, a thermosetting film-forming component, 25 the black coating composition comprising an amount of the black pigment and the alkoxysilane oligomer to be -65% by weight was coated, black coating formed vehicle components and / or fastening components can be obtained by heat cured.