UNDERLAYER TREATMENT SOLUTION, METHOD FOR MANUFACTURING ORGANIC COATED GALVANIZED STEEL PIPE USING THE SAME AND ORGANIC COATED GALVANIZED STEEL PIPE

• Main Authors: SUGAE KIYONOBU, KAMIMURA TAKAYUKI, KIMURA YOSHIHISA, YOSHIZAKI NOBUKI, NAKAGISHI TETSUYUKI
• Format: Patent
• Language: English; Japanese
• Published: 20.06.2016
• 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; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

PROBLEM TO BE SOLVED: To provide an underlayer treatment solution capable of forming an underlayer allowing increase of adhesion to an organic resin layer even on a galvanized layer.SOLUTION: The underlayer treatment solution comprises: an aqueous solvent; a zirconium compound having a concentration of 0.05-10.50 mass% in terms of metal Zr; a vanadium compound having a concentration of 0.004-0.400 mass% in terms of metal V; an ammonium phosphate having a concentration of 0.07-7.50 mass% in terms of phosphate ions; a silane coupling agent having a concentration of 0.1-10 mass% in terms of a solid content and/or a hydrolytic condensate thereof; and a silica compound having a concentration of 0.2-10 mass% in terms of a solid content and has a pH of 8-12.SELECTED DRAWING: None 【課題】亜鉛めっき層上であっても、有機樹脂層の密着性を高めることができる下地層を形成可能な下地処理液を提供する。【解決手段】本実施形態の下地処理液は、水系溶媒と、金属Ｚｒ換算濃度で０.０５〜１０．５０質量％のジルコニウム化合物と、金属Ｖ換算濃度で０.００４〜０.４００質量％のバナジウム化合物と、リン酸イオン換算濃度で０.０７〜７.５０質量％のリン酸アンモニウムと、固形分換算濃度で、０.１〜１０質量％のシランカップリング剤及び／又はその加水分解縮合物と、固形分換算濃度で０．２〜１０質量％のシリカ化合物とを含有し、８〜１２のｐＨを有する。【選択図】なし