Patent ID: 9499700
Filing Date: 2016-11-22
CPC Classification: C09D,C23C

Claim Text:
1. A finishing agent for forming a finishing coating on a member under treatment, the member under treatment being a member a surface of which has been treated with chemical conversion treatment, the finishing agent containing: a water-soluble phosphoric acid-based compound comprising one or more water-soluble substances selected from the group consisting of orthophosphoric acid and condensed phosphoric acid, ions thereof, and salts and coordination compounds including the ions thereof; a water-soluble organic acid compound comprising one or more water-soluble substances selected from organic acids, ions thereof, and salts and coordination compounds including the ions thereof; a water-soluble trivalent chromium-containing substance; and an organic-based material as a matrix-forming component; wherein the finishing agent contains no nitric acid ion, wherein the finishing agent contains at least one kind selected from the group consisting of a water-soluble aluminum-containing substance and a water-soluble zirconium-containing substance, and the ratio of the total of the chromium equivalent molar concentration of the water-soluble trivalent chromium-containing substance, an aluminum equivalent molar concentration of the water-soluble aluminum-containing substance, and a zirconium equivalent molar concentration of the water-soluble zirconium-containing substance relative to the phosphorus equivalent molar concentration of the water-soluble phosphoric acid-based compound is 0.5 or more and less than or equal to 1.5, wherein the ratio of a trivalent chromium equivalent molar concentration of the water-soluble trivalent chromium-containing substance relative to a phosphoric acid equivalent molar concentration of the water-soluble phosphoric acid-based compound is 0.2 or more and equal to or less than 1.0, and wherein the water-soluble organic acid compound comprises at least one of citric acid and ions thereof.