Method for prevention of yellowing on surface of steel sheet after pickling
US-2015013716-A1 · Jan 15, 2015 · US
Composition for washing pickled steel plate, method for washing pickled steel plate by using same, and steel plate obtained thereby
US11028322B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11028322-B2 |
| Application number | US-201616062926-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 19, 2016 |
| Priority date | Dec 18, 2015 |
| Publication date | Jun 8, 2021 |
| Grant date | Jun 8, 2021 |
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Abstract
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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.
First claim
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The invention claimed is: 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). 2. 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. 3. 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. 4. The composition for washing of claim 1 , wherein the composition for washing has a pH of at least 8.0. 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. 6. 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. 7. 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. 8. 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. 9. The method for washing of claim 5 , wherein the composition for washing has a pH of at least 8.0.
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Classifications
of iron or steel · CPC title
including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates · CPC title
with at least one zinc-based layer · CPC title
containing silicon · CPC title
- C23G1/08Primary
Iron or steel · CPC title
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- What does patent US11028322B2 cover?
- 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 …
- Who is the assignee on this patent?
- Posco
- What technology area does this patent fall under?
- Primary CPC classification C23G1/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 08 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).