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Preparation method of zinc alloy blackening treatment liquid for lamps

A technology of blackening treatment and preparation method, which is applied in the direction of metal material coating process, etc., which can solve the problems of hanging ash or sediment, increasing production costs, increasing the difficulty of cleaning and blackening liquid treatment, etc., and achieves excellent decorative performance and blackening good effect

Inactive Publication Date: 2015-02-11
WUXI SHITANGWAN IND PARK DEV CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to meet the national sewage discharge standard, surface treatment enterprises must increase investment in the treatment of sewage discharge, which greatly increases the production cost; most of the formulas will produce hanging ash or sediment during the blackening process, which increases the treatment of cleaning and blackening liquid difficulty

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A method for preparing a zinc alloy blackening treatment solution for lamps. The composition of the treatment solution is: 6% oxalic acid, 9% citric acid, 5% 85% phosphoric acid, 8% sodium chloride, and 2% trisodium phosphate. %, potassium peroxide 14%, sodium pyrophosphate 2.5%, 8-hydroxyquinoline 2.0%, copper sulfate 11%, carotene 1.5%, and the balance is water; the preparation method is: take an appropriate amount of water to dissolve oxalic acid, Citric acid and phosphoric acid, prepare mixed acid solution, then take appropriate amount of water, add sodium chloride, trisodium phosphate, potassium peroxide, sodium pyrophosphate, 8-hydroxyquinoline, copper sulfate and carotene successively, stir for 12 Minutes to make it uniform, then add the mixed acid solution to the solution, and add the rest of the water, and then stir for 10 minutes.

Embodiment 2

[0015] A method for preparing a zinc alloy blackening treatment solution for lamps. The composition of the treatment solution is calculated by weight percentage: 8% oxalic acid, 7% citric acid, 7% 85% phosphoric acid, 6% sodium chloride, and 4% trisodium phosphate. %, potassium peroxide 12%, sodium pyrophosphate 3.5%, 8-hydroxyquinoline 1.0%, copper sulfate 13%, carotene 0.5%, and the balance is water; the preparation method is: take an appropriate amount of water to dissolve oxalic acid, Citric acid and phosphoric acid, prepare mixed acid solution, then take appropriate amount of water, add sodium chloride, trisodium phosphate, potassium peroxide, sodium pyrophosphate, 8-hydroxyquinoline, copper sulfate and carotene successively, stir for 16 Minutes to make it uniform, then add the mixed acid solution to the solution, and add the rest of the water, and then stir for 8 minutes.

Embodiment 3

[0017] A method for preparing a zinc alloy blackening treatment solution for lamps. The composition of the treatment solution is: 7% oxalic acid, 8% citric acid, 6% 85% phosphoric acid, 7% sodium chloride, and 3% trisodium phosphate. %, potassium peroxide 13%, sodium pyrophosphate 3.0%, 8-hydroxyquinoline 1.5%, copper sulfate 12%, carotene 1.0%, and the balance is water; the preparation method is: take an appropriate amount of water to dissolve oxalic acid, Citric acid and phosphoric acid, prepare the mixed acid solution, then take appropriate amount of water, add sodium chloride, trisodium phosphate, potassium peroxide, sodium pyrophosphate, 8-hydroxyquinoline, copper sulfate and carotene successively, stir for 14 Minutes to make it uniform, then add the mixed acid solution to the solution, and add the rest of the water, and then stir for 9 minutes.

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Abstract

The present invention discloses a preparation method of a zinc alloy blackening treatment liquid for lamps. The treatment liquid adopted by the process comprises, by weight, 6-8% of oxalic acid, 7-9% of citric acid, 5-7% of 85% phosphoric acid, 6-8% of sodium chloride, 2-4% of trisodium phosphate, 12-14% of potassium peroxide, 2.5-3.5% of sodium pyrophosphate, 1.0-2.0% of 8-hydroxyquinoline, 11-13% of copper sulfate, 0.5-1.5% of carotene, and the balance of water. The preparation method comprises: taking an appropriate amount of water to dissolve oxalic acid, citric acid and phosphoric acid to prepare a mixed acid solution, taking an appropriate amount of water, sequentially adding sodium chloride, trisodium phosphate, potassium peroxide, sodium pyrophosphate, 8-hydroxyquinoline, copper sulfate and carotene, stirring for 12-16 min to make it uniform, adding the mixed acid solution to the obtained solution, adding the balance of water, and then stirring for 8-10 min.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a method for preparing a zinc alloy blackening treatment liquid for lamps. Background technique [0002] Zinc and zinc alloys are widely used in lamps. In order to beautify the appearance of zinc alloy lamps and meet the requirements of light absorption on the surface of some special devices, it is necessary to treat the surface of zinc alloy to black. [0003] In the current traditional industrial production, most of the formulas used for the blackening of the surface of zinc and zinc alloys contain toxic ingredients such as trivalent chromium, hexavalent chromium, selenium salts, rare metal salts or cyanides, which seriously threaten operators. health and cause serious pollution to the environment. [0004] CN101283117A provides a treatment solution for forming a black trivalent chromium chemical conversion film with a uniform and stable black, glossy appearance and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/47
CPCC23C22/47
Inventor 庄进
Owner WUXI SHITANGWAN IND PARK DEV CONSTR
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