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Rapid blackening solution for iron and steel at room temperature and preparation method thereof

A normal temperature, steel technology, applied in the direction of metal material coating technology, etc., can solve the problems of poor corrosion resistance, poor decoration, uneven color of the blackened film layer, etc., to achieve good synchronization, stable speed, and combination powerful effect

Active Publication Date: 2017-07-11
HUNAN JINYU CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the color of the blackened film layer formed by this patent is uneven, and the corrosion resistance and decorative property of the blackened film layer are poor.

Method used

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  • Rapid blackening solution for iron and steel at room temperature and preparation method thereof
  • Rapid blackening solution for iron and steel at room temperature and preparation method thereof
  • Rapid blackening solution for iron and steel at room temperature and preparation method thereof

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with specific examples.

[0036] Examples 1-12 respectively provide the raw material composition of the rapid blackening solution of iron and steel at room temperature of the present invention, specifically as listed in Table 1 and Table 2, wherein the unit of each ingredient value is g / L, and the solution volume is 1L.

[0037] Table 1 embodiment 1-6 formula composition

[0038]

[0039] Table 2 Embodiment 7-12 formula composition

[0040]

[0041] The preparation method of above embodiment is as follows:

[0042] (1) Take two-thirds of the volume of water and add copper sulfate pentahydrate, sulfuric acid and ammonium chloride, and stir until completely dissolved;

[0043] (2) Add chromium oxide, stir until all dissolve, add boric acid, citric acid, ammonium citrate, sodium thiosulfate, stir until all dissolve;

[0044] (3) Add octylphenol polyoxyethylene ether, stir until all diss...

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Abstract

The invention provides an iron and steel normal temperature rapid blackening solution. The blackening solution comprises the following components in the following contents: 3-12 g / L of copper sulfate pentahydrate, 1.5-3.5 g / L of chromium oxide, 5-15 g / L of ammonium chloride, 3-10 g / L of citric acid, 1-10 g / L of octaphenyl polyoxyethyiene, 0.2-0.5 g / L of ammonium citrate, 5-10 g / L of sodium thiosulfate, 0.73-0.76 g / L of sulfuric acid, 0.6-0.8 g / L of boric acid and the balance of water. The iron and steel normal temperature rapid blackening solution has the advantages of stable solution, short blackening time, proper color, convenient and simple used process, sufficient raw material, low cost and the like, and particularly, the adhesion and the corrosion resistance capacity of a blackening film layer are obviously improved. The blackening solution has the characteristics of no pollution, energy saving, no steel type selectivity and the like.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, more specifically, to a rapid blackening solution for iron and steel at room temperature and a preparation method thereof. Background technique [0002] Iron and steel blackening liquid is widely used in the blackening decoration and protective treatment of the surface of steel parts in mechanical parts, standard parts, craft products, springs and other industrial sectors. Most of the iron and steel blackening liquids in the prior art are alkaline, and high-temperature blackening causes large pollution, high energy consumption, and steel type selectivity. [0003] Chinese patent CN1139706 discloses a non-toxic blackening solution for iron and steel at room temperature, which contains 3-8g / L CuSO 4 ·5H 2 O, 1.5-3.5g / L CrO 3 ,4-9g / L NH 4 Cl, sodium gluconate of 3-8g / L, polyethylene glycol of 2-5ml / L, the acid whose content is to make the pH value of the blackening solution 1.5-2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/50
CPCC23C22/50C23C2222/10
Inventor 桂成方
Owner HUNAN JINYU CHEM
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