# US 11,028,322 B2 · Composition for washing pickled steel plate, method for washing pickled steel plate by using same, and steel plate obtained thereby > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,322 B2 - Document ID: US11028322B2 - Status: Granted - Kind: B2 - Application number: 16/062,926 - Filed: 2016-12-19 - Published: 2020-08-27 - Granted: 2021-06-08 - Earliest claimed: 2015-12-18 - Assignees: Posco - Applicants: Posco - Inventors: Rho-Bum Park; Yon-Kyun Song; Ji-Hoon Park; Hoon Yun; Seok-Chan Choe; Kyoung-Pil Ko - Web page: https://patentgrep.com/patent/US11028322B2 ## CPC - C09K 15/32: containing {two or more of} boron, silicon, phosphorus, selenium, tellurium or a metal - C23G 1/08: Iron or steel - B08B 3/08: the liquid having chemical or dissolving effect - C09D 5/08: Anti-corrosive paints - C09D 179/02: Polyamines - C22C 38/02: containing silicon - C22C 38/04: containing manganese - C23C 22/07: containing phosphates - C23C 28/3225: {with at least one zinc-based layer} - C23C 28/34: {including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates} - C23G 1/083: {solutions containing H3PO4} - C25D 5/36: of iron or steel - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - C23G: CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS - B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - C22C: ALLOYS (treatment of alloys C21D, C22F) - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - C25D: PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR ## Abstract A composition for washing a pickled steel plate and a method for washing a pickled steel plate using the same are provided. The composition for washing a pickled steel plate includes a phosphoric acid ester compound, an amine-based compound, sodium carbonate, ammonium acetate, ethylene diamine tetraacetic acid (EDTA) and a remainder of water, and the method for washing a pickled steel plate is performed using the same. ## Claims ### Claim 1 A composition for washing a pickled steel plate comprising 6 to 14 wt % of a phosphoric acid ester compound, 6 to 19 wt % of an amine-based compound, 1 to 9 wt % of sodium carbonate, 1 to 9 wt % of ammonium acetate, 1 to 14 wt % of ethylene diamine tetraacetic acid (EDTA), and a remainder of water; with the proviso that the amine-based compound is not (EDTA). ### Claim 2 (depends on 1) The composition for washing of claim 1, wherein the phosphoric acid ester compound is at least one compound selected from the group consisting of bisphenol A-bis(diphenyl phosphate), triaryl phosphate isopropylate, dimethylmethyl phosphate, tetraphenyl m-phenylene bis(phosphate), triethyl phosphate and triphenyl phosphate. ### Claim 3 (depends on 1) The composition for washing of claim 1, wherein the amine-based compound is at least one selected from the group consisting of ethylamine, methylamine, propylamine, butylamine, polyethylamine, polypropylamine, polybutylamine and polyarylamine. ### Claim 4 (depends on 1) The composition for washing of claim 1, wherein the composition for washing has a pH of at least 8.0. ### Claim 5 A method for washing a pickled steel plate, comprising: preparing a composition for washing a pickled steel plate by mixing 6 to 14 wt % of a phosphoric acid ester compound, 6 to 19 wt % of an amine-based compound, 1 to 9 wt % of sodium carbonate, 1 to 9 wt % of ammonium acetate, 1 to 14 wt % of EDTA, and a remainder of water; with the proviso that the amine-based compound is not (EDTA); diluting the composition for washing with water; and immersing the pickled steel plate in the composition for washing. ### Claim 6 (depends on 5) The method for washing of claim 5, wherein the diluting the composition for washing with water is performed by diluting 0.05 to 1.5 wt % of the composition for washing with water. ### Claim 7 (depends on 5) The method for washing of claim 5, wherein the phosphoric acid ester compound is at least one compound selected from the group consisting of bisphenol A-bis(diphenyl phosphate), triaryl phosphate isopropylate, dimethylmethyl phosphate, tetraphenyl m-phenylene bis(phosphate), triethyl phosphate and triphenyl phosphate. ### Claim 8 (depends on 5) The method for washing of claim 5, wherein the amine-based compound is at least one selected from the group consisting of ethylamine, methylamine, propylamine, butylamine, polyethylamine, polypropylamine, polybutylamine and polyarylamine. ### Claim 9 (depends on 5) The method for washing of claim 5, wherein the composition for washing has a pH of at least 8.0.