阅读说明：本技术 一种少渣少灰的锌系磷化液 (Zinc-based phosphating solution with less slag and ash ) 是由 许峻豪 于 2021-11-04 设计创作，主要内容包括：一种少渣少灰的锌系磷化液,涉及磷化液技术领域,其包括以下质量百分比的组分：磷酸16～17%、氧化锌4～5%、硝酸锌26.5～27.5%、N-羟乙基乙二胺三乙酸1.5～5%、1,10-二氮菲0.5～2%、双氧水0.5～2.5%、去离子水44～50%。本发明可减少磷化过程中钢管表面产生的磷灰磷渣,并提高磷化效果,改善磷化膜的质量。(A zinc phosphating solution with less slag and less ash relates to the technical field of phosphating solutions, and comprises the following components in percentage by mass: 16-17% of phosphoric acid, 4-5% of zinc oxide, 26.5-27.5% of zinc nitrate, 1.5-5% of N-hydroxyethyl ethylenediamine triacetic acid, 0.5-2% of 1, 10-phenanthroline, 0.5-2.5% of hydrogen peroxide and 44-50% of deionized water. The invention can reduce the phosphorus ash and slag generated on the surface of the steel pipe in the phosphorization process, improve the phosphorization effect and improve the quality of a phosphorization film.)

1. The zinc phosphating solution with less slag and less ash is characterized by comprising the following components in percentage by mass: 16-17% of phosphoric acid, 4-5% of zinc oxide, 26.5-27.5% of zinc nitrate, 1.5-5% of N-hydroxyethyl ethylenediamine triacetic acid, 0.5-2% of 1, 10-phenanthroline, 0.5-2.5% of hydrogen peroxide and 44-50% of deionized water.

2. The zinc-based phosphating solution with less slag and less ash according to claim 1, which is characterized by comprising the following components in percentage by mass: 16.4 percent of phosphoric acid, 4.3 percent of zinc oxide, 26.8 percent of zinc nitrate, 3.6 percent of N-ethoxyl ethylene diamine triacetic acid, 1.3 percent of 1, 10-diazophenanthrene, 2 percent of hydrogen peroxide and 45.6 percent of deionized water.

3. The zinc-based phosphating solution with less slag and less ash according to claim 1, which is characterized in that: the phosphoric acid is 85% phosphoric acid.

4. The zinc-based phosphating solution with less slag and less ash according to claim 1, which is characterized in that: the zinc oxide is 98% pure zinc oxide.

5. The zinc-based phosphating solution with less slag and less ash according to claim 1, which is characterized in that: the zinc nitrate is 98% pure zinc nitrate.

6. The zinc-based phosphating solution with less slag and less ash according to claim 1, which is characterized in that: the hydrogen peroxide is hydrogen peroxide with the concentration of 30 percent.

Technical Field

The invention relates to the technical field of phosphating solutions, in particular to a zinc phosphating solution with less slag and less ash.

Background

The zinc phosphating solution is one of important materials for corrosion prevention of metal materials, and aims to provide corrosion prevention protection for base metals, prime before paint spraying, improve the adhesive force and corrosion prevention capability of a coating layer, play a role in friction reduction and lubrication in metal processing and the like.

The zinc phosphating solution is usually used in the cold drawing operation of the common steel pipe, but phosphorous slag and phosphorous ash can be generated in the using process. In the later stage of using the phosphating solution, the situation is particularly serious, a large amount of phosphorus slag or phosphorus ash can cover the steel pipe, on one hand, the thickness of a phosphating film on the surface of the steel pipe is uneven, because the wall thickness of the pulled pipe is uneven due to uneven pulling force in the drawing process of the steel pipe, and then due to the coverage of a large amount of phosphorus slag and phosphorus ash, patches or stripes can be more easily formed on the surface of the pipe, the appearance and the quality of the steel pipe are influenced, and the mould is damaged by uneven friction resistance; on the other hand, a large amount of phosphorus slag and phosphorus ash not only increase the work load of workers for removing slag and ash, but also lead to the reduction of the service life of the phosphating solution due to the gradual deterioration of the stability of the phosphating solution, so the consumption is correspondingly increased, and the cost of environmental protection and treatment is increased.

Disclosure of Invention

The invention aims to provide a zinc phosphating solution with less slag and less ash, which reduces the generation of phosphorite and phosphorite slag on the surface of a steel pipe in the phosphating process, improves the phosphating effect and improves the quality of a phosphating film.

In order to solve the technical problems, the invention adopts the following technical scheme: a zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16-17% of phosphoric acid, 4-5% of zinc oxide, 26.5-27.5% of zinc nitrate, 1.5-5% of N-hydroxyethyl ethylenediamine triacetic acid, 0.5-2% of 1, 10-phenanthroline, 0.5-2.5% of hydrogen peroxide and 44-50% of deionized water.

Preferably, the zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4 percent of phosphoric acid, 4.3 percent of zinc oxide, 26.8 percent of zinc nitrate, 3.6 percent of N-ethoxyl ethylene diamine triacetic acid, 1.3 percent of 1, 10-diazophenanthrene, 2 percent of hydrogen peroxide and 45.6 percent of deionized water.

Wherein the phosphoric acid is 85% phosphoric acid; the zinc oxide is 98% pure zinc oxide; the zinc nitrate is 98% pure zinc nitrate; the hydrogen peroxide is hydrogen peroxide with the concentration of 30 percent.

The invention has the beneficial effects that: the zinc phosphating solution provided by the invention is used in the cold drawing operation process of the steel pipe, so that the generation of phosphorus slag and phosphorus ash can be reduced to a great extent, the phosphating effect can be improved, and the quality of a phosphating film formed on the surface of the steel pipe is improved.

Detailed Description

The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.

Example 1

A zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4% of phosphoric acid, 4.3% of zinc oxide, 26.8% of zinc nitrate, 1.5% of N-hydroxyethyl ethylenediamine triacetic acid, 1.3% of 1, 10-diazophenanthrene, 2% of hydrogen peroxide and 47.7% of deionized water.

Example 2

A zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4 percent of phosphoric acid, 4.3 percent of zinc oxide, 26.8 percent of zinc nitrate, 3.6 percent of N-ethoxyl ethylene diamine triacetic acid, 1.3 percent of 1, 10-diazophenanthrene, 2 percent of hydrogen peroxide and 45.6 percent of deionized water.

Example 3

A zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4% of phosphoric acid, 4.3% of zinc oxide, 26.8% of zinc nitrate, 4.6% of N-hydroxyethyl ethylenediamine triacetic acid, 1.3% of 1, 10-diazophenanthrene, 2% of hydrogen peroxide and 44.6% of deionized water.

Comparative example 1

A zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4% of phosphoric acid, 4.3% of zinc oxide, 26.8% of zinc nitrate, 1, 10-phenanthroline, 2% of hydrogen peroxide and 49.2% of deionized water.

The component data comparative ratios of the above examples and comparative examples are shown in table 1 below.

TABLE 1 comparison of component data for examples 1-3 and comparative example 1

Performance testing

The zinc phosphating solutions of the examples and the comparative examples were subjected to performance tests, specifically, the zinc phosphating solution with a total acidity of 20 points was placed in a 500ml beaker, then a common carbon steel water pipe was taken and placed in the beaker, phosphating was performed at a phosphating temperature of 70 ℃ for 20 minutes, then the carbon steel water pipe after phosphating was taken out and tested, and the obtained data are shown in table 2 below.

TABLE 2 Performance of carbon steel water pipe after phosphating of examples 1-3 and comparative example 1

As shown in the test results in Table 2, the addition of N-hydroxyethylethylene diamine triacetic acid (HEDTA) can significantly inhibit the production of phosphorous slag, and the inhibition effect is better when the amount is 4.6%, but in practical production application, the person skilled in the art can choose to use N-hydroxyethylethylene diamine triacetic acid (HEDTA) in the amount of 3.6% in the formulation according to the consideration of production cost.

Example 4

A zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4 percent of phosphoric acid, 4.3 percent of zinc oxide, 26.8 percent of zinc nitrate, 3.6 percent of N-ethoxyl ethylene diamine triacetic acid, 0.5 percent of 1, 10-diazophenanthrene, 2 percent of hydrogen peroxide and 46.4 percent of deionized water.

Example 5

A zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4 percent of phosphoric acid, 4.3 percent of zinc oxide, 26.8 percent of zinc nitrate, 3.6 percent of N-ethoxyl ethylene diamine triacetic acid, 1.3 percent of 1, 10-diazophenanthrene, 2 percent of hydrogen peroxide and 45.6 percent of deionized water.

Example 6

A zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4 percent of phosphoric acid, 4.3 percent of zinc oxide, 26.8 percent of zinc nitrate, 3.6 percent of N-ethoxyl ethylene diamine triacetic acid, 1.8 percent of 1, 10-diazophenanthrene, 2 percent of hydrogen peroxide and 45.1 percent of deionized water.

Comparative example 2

A zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4% of phosphoric acid, 4.3% of zinc oxide, 26.8% of zinc nitrate, 3.6% of N-hydroxyethyl ethylenediamine triacetic acid, 2% of hydrogen peroxide and 46.9% of deionized water.

The component data comparison ratios of the above examples and comparative examples are shown in table 3 below.

TABLE 3 comparison of component data for examples 4-6 and comparative example 2

Performance testing

The zinc phosphating solutions of the examples and the comparative examples were subjected to performance tests, specifically, the zinc phosphating solution with a total acidity of 20 points was placed in a 500ml beaker, then a common carbon steel water pipe was taken and placed in the beaker, phosphating was performed at a phosphating temperature of 70 ℃ for 20 minutes, and then the carbon steel water pipe after phosphating was taken out and tested, and the obtained data are shown in table 4 below.

TABLE 4 Performance of phosphatized carbon steel water pipes of examples 4-6 and comparative example 2

From the test results in table 4, it can be seen that the addition of 1, 10-phenanthroline (phen) has a great influence on ferrous iron in the solution and also on the quality of the phosphating film, and it can be seen that the addition of 1, 10-phenanthroline (phen) can reduce the content of ferrous iron in the phosphating solution, so as to improve the quality of the phosphating film, and the effect is better when the amount is 1.8%, but because the effect when the amount is 1.3% is not much different from that, in practical production application, a person skilled in the art can select 1.3% 1, 10-phenanthroline (phen) to be used in the formulation according to the consideration of production cost.

Example 7

A zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4 percent of phosphoric acid, 4.3 percent of zinc oxide, 26.8 percent of zinc nitrate, 3.6 percent of N-ethoxyl ethylene diamine triacetic acid, 1.3 percent of 1, 10-diazophenanthrene, 0.5 percent of hydrogen peroxide and 47.7 percent of deionized water.

Example 8

A zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4 percent of phosphoric acid, 4.3 percent of zinc oxide, 26.8 percent of zinc nitrate, 3.6 percent of N-ethoxyl ethylene diamine triacetic acid, 1.3 percent of 1, 10-diazophenanthrene, 2 percent of hydrogen peroxide and 45.6 percent of deionized water.

Example 9

A zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4 percent of phosphoric acid, 4.3 percent of zinc oxide, 26.8 percent of zinc nitrate, 3.6 percent of N-ethoxyl ethylene diamine triacetic acid, 1.3 percent of 1, 10-diazophenanthrene, 2.5 percent of hydrogen peroxide and 44.6 percent of deionized water.

Comparative example 3

A zinc phosphating solution with less slag and less ash comprises the following components in percentage by mass: 16.4 percent of phosphoric acid, 4.3 percent of zinc oxide, 26.8 percent of zinc nitrate, 3.6 percent of N-ethoxyl ethylene diamine triacetic acid, 1.3 percent of 1, 10-diazocine and 49.2 percent of deionized water.

The component data of each of the above examples and comparative examples are shown in table 5 below.

TABLE 5 comparison of component data for examples 7-9 and comparative example 3

Performance testing

The zinc phosphating solutions of the examples and the comparative examples were subjected to performance tests, specifically, the zinc phosphating solution with a total acidity of 20 points was placed in a 500ml beaker, then a common carbon steel water pipe was taken and placed in the beaker, phosphating was performed at a phosphating temperature of 70 ℃ for 20 minutes, and then the carbon steel water pipe after phosphating was taken out and tested, and the obtained data are shown in table 6 below.

TABLE 6 properties of carbon steel water pipes of examples 7 to 9 and comparative example 3 after phosphating

The test results in table 6 show that the addition of sufficient hydrogen peroxide is also helpful for reducing the generation of phosphorous slag, and actually, the hydrogen peroxide mainly oxidizes ferrous iron in the solution into ferric iron, so that the phosphorous slag is separated out conveniently, and the phosphorous ash on the surface of the steel pipe is reduced to improve the quality of the phosphorous coating. But the dosage of the hydrogen peroxide is not too much, otherwise, the generation of a phosphating film is influenced, so that the effect is better when the dosage of the hydrogen peroxide is 2 percent.

The zinc-based phosphating solution with less slag and ash provided by the embodiment is applied to actual steel pipe cold-drawing production operation, the achieved phosphating effect is better, the adhesion of a phosphating film is stronger, the phosphorus slag generated in the phosphating process is less, the phosphorus ash on the surface of the steel pipe is less, and on the other hand, the slag and ash cleaning workload of workers is reduced to a great extent. And because the ferrous content in the phosphating solution is reduced, the phosphorus slag is easier to separate out, so the stability of the phosphating solution is improved to a certain extent, the waste caused by poor stability of the phosphating solution like the common zinc phosphating solution is avoided, the consumption of the production process is increased, the production cost is reduced, and the cost of environmental protection treatment can be reduced. In conclusion, the zinc phosphating solution with less slag and less ash provided by the invention can well solve the problems of the conventional common zinc phosphating solution and has better use value and prospect.

The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.

Some descriptions of the present invention have been simplified to facilitate understanding of the improvement of the present invention over the prior art by those of ordinary skill in the art, and some other elements have been omitted from this document for clarity, and those omitted elements should be recognized by those of ordinary skill in the art to constitute the content of the present invention.