CN109680284B

CN109680284B - Reductive borosulfate rust remover

Info

Publication number: CN109680284B
Application number: CN201910150765.6A
Authority: CN
Inventors: 王永光; 宋小林; 宋烨桐
Original assignee: Wuxi Narunte Technology Co ltd; Suzhou Nafulinke Metal Surface Technology Co ltd
Current assignee: Zhenjiang Naruto High Tech Development Co ltd; Nanolubtech Wuxi Sci and Tech Co Ltd
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-09-04
Anticipated expiration: 2039-02-28
Also published as: CN109680284A

Abstract

The application provides a reducing boric sulfate rust remover, and the preparation steps are as follows: (1) heating 40-80 parts of nonylphenol or nonylphenol polyoxyethylene ether to 120-140 ℃, and slowly adding 110 parts of boric acid, and reacting for 80-120 minutes after the addition is finished; (2) cooling to 70-80 ℃, adding 1-5 parts of auxiliary agent, and naturally cooling to normal temperature; (3) slowly adding 0.5-4 parts of S under vacuum₂O₃Or SO₃Stirring while adding, heating to 60-70 ℃ after adding, and reacting for 80-120 minutes; (4) cooling to below 50 ℃, adding 1-5 parts of an auxiliary agent, reacting for 80-120 minutes, and then naturally cooling to below 30 ℃; (5) and adding 2-6 parts of a reducing agent, and uniformly stirring. The rust remover has rapid and thorough effect on removing oxide skin.

Description

Reductive borosulfate rust remover

Technical Field

The invention relates to the technical field of rust removal, in particular to a reducing borosulfate rust remover.

Background

Ferrous metals, nonferrous metals and other materials are easy to rust outdoors or outdoors, which not only affects the appearance quality, but also affects the normal operation of processes such as paint spraying, bonding and the like, and if the materials are not treated in time, the materials are scrapped, thereby causing unnecessary economic loss.

The first generation of rust remover is strong acid, acid can react with iron rust and metal oxide to generate soluble salt, so as to achieve the purpose of rust removal, and the acid can react with base metal to release hydrogen while removing rust, and the hydrogen can generate pressure on the iron rust and indissolvable oxide skin, thus being beneficial to the peeling of the iron rust and the reduction of high-valence iron, and accelerating the pickling process, but the traditional acid solution treatment method also has obvious defects: namely, the generation of a large amount of hydrogen in the treatment process can cause the hydrogen embrittlement phenomenon of steel, cause the reduction of the mechanical property of metal and influence the strength of the steel; meanwhile, acid mist is easily formed, which affects the health of operators and corrodes surrounding equipment and environment; the consumption of acid liquor is also large, and the treatment cost is increased; such acids can cause over-corrosion of the steel. In addition, the large amount of generated residues need to be discharged frequently, which not only seriously corrodes industrial pipelines, but also pollutes soil and environment.

The second generation rust remover is a chemical substance containing nitrogen and phosphorus, and although the defects that the first generation rust remover is harmful to human bodies, generates acid mist, corrodes base materials and the like can be overcome, the second generation rust remover easily enters a water system to cause eutrophication. At present, the harm of the second generation rust remover to the environment is increasingly attracting attention. The development of a new generation of rust removal products is imminent.

Disclosure of Invention

Aiming at the problems in the prior art, the application provides a reducing sulfate rust remover. The rust remover has the advantages of rapid and thorough rust removing capability, better rust removing effect than that of a strong acid or nitrogen-phosphorus rust remover, environmental protection and no toxic or side effect on human bodies.

The technical scheme of the invention is as follows:

a boric sulfate reductive rust remover is prepared by the following steps:

(1) putting 40-80 parts of nonylphenol or nonylphenol polyoxyethylene ether into a reaction kettle, heating to 120-140 ℃, slowly adding 1-10 parts of boric acid, and reacting for 80-120 minutes after the addition is finished;

(2) after the reaction is finished, cooling to 70-80 ℃, adding 1-5 parts of an auxiliary agent, and naturally cooling to normal temperature;

(3) slowly adding 0.5-4 parts of S under vacuum₂O₃Or SO₃Stirring while adding, heating to 60-70 ℃ after adding, and reacting for 80-120 minutes;

(4) after the reaction is finished, cooling to below 50 ℃, adding 1-5 parts of an auxiliary agent, reacting for 80-120 minutes, and then naturally cooling to below 30 ℃;

(5) and adding 2-6 parts of a reducing agent, and uniformly stirring.

Preferably, the nonylphenol polyoxyethylene ether is at least one selected from the group consisting of NP-4, NP-7, NP-10, NP-15, and NP-20.

Preferably, the adjuvant is at least one selected from the group consisting of propylene glycol, glycerol, diglycerol, sorbitol, epoxidized soybean oil, pentaerythritol, xylitol, and mannitol.

Preferably, the reducing agent is sodium sulfite or ferrous sulfate.

The purity of each raw material is more than 99%.

The beneficial technical effects of the invention are as follows:

the rust remover prepared by the invention has good rust removing and cleaning capabilities for mild rust and severe rust. Especially for oxide skin, can remove rapidly and thoroughly. Generally, the iron oxide scale is divided into three layers, wherein the outermost layer is ferric oxide, the middle layer is ferric oxide and a ferroferric oxide mixture, the innermost layer is ferric oxide, the ferric oxide is sticky, the rust remover has super-strong cleaning capability, and otherwise, the ferric oxide is extremely difficult to remove from the surface of the steel; the rust remover provided by the application can thoroughly remove oxide skin.

The rust remover provided by the invention is a concentrated agent, is soluble in water, is non-toxic and harmless, is non-volatile and non-corrosive after being added with water to prepare 3-5% of rust remover liquid, does not need protective measures, is convenient to use, can be used for soaking a base material to be treated in the rust remover by holding the base material to be treated by hands, can be used for spraying the rust remover on the base material to be treated, and can be used for accelerating the rust removal speed by methods of ultrasound, stirring and the like.

Drawings

FIG. 1 shows the effect of the rust remover on removing light rust.

FIG. 2 shows the effect of the rust remover on removing heavy rust.

FIG. 3 shows the effect of the rust remover on removing scale.

Detailed Description

The present invention will be described in detail with reference to examples. The purity of each raw material used in the examples was 99% or more.

Example 1

The application provides a boron sulfate reductive rust remover, which comprises the following preparation steps:

(1) adding 40 parts of nonyl phenol into a reaction kettle, heating to 120 ℃, then slowly adding 1 part of boric acid, and reacting for 120 minutes after the addition is finished;

(2) after the reaction is finished, cooling to 70 ℃, adding 1 part of auxiliary propylene glycol, and naturally cooling to normal temperature;

(3) slowly add 0.5 part S under 10Pa vacuum₂O₃Stirring while adding, heating to 60 ℃ after adding, and reacting for 120 minutes;

(4) after the reaction is finished, cooling to below 50 ℃, adding 1 part of auxiliary propylene glycol, reacting for 80 minutes, and then naturally cooling to below 30 ℃;

(5) adding 2 parts of reducing agent sodium sulfite, and uniformly stirring.

Example 2

(1) putting 50 parts of nonyl phenol into a reaction kettle, heating to 125 ℃, then slowly adding 3 parts of boric acid, and reacting for 100 minutes after the addition is finished;

(2) after the reaction is finished, cooling to 70 ℃, adding 2 parts of auxiliary agent diglycerin, and naturally cooling to normal temperature;

(3) slowly add 1.5 parts SO under 5Pa vacuum₃Stirring while adding, heating to 70 ℃ after adding, and reacting for 80 minutes;

(4) after the reaction is finished, cooling to below 50 ℃, adding 3 parts of auxiliary agent glycerol, reacting for 100 minutes, and then naturally cooling to below 30 ℃;

(5) adding 3 parts of reducing agent ferrous sulfate, and uniformly stirring.

Example 3

(1) adding 65 parts of nonylphenol polyoxyethylene ether NP-4 into a reaction kettle, heating to 130 ℃, slowly adding 5 parts of boric acid, and reacting for 90 minutes after the addition is finished;

(2) after the reaction is finished, cooling to 80 ℃, adding 3 parts of auxiliary agent epoxidized soybean oil, and naturally cooling to normal temperature;

(3) 2.5 parts of S are slowly added under a vacuum of 15Pa₂O₃Stirring while adding, heating to 60 ℃ after adding, and reacting for 110 minutes;

(4) after the reaction is finished, cooling to below 50 ℃, adding 4 parts of auxiliary pentaerythritol, reacting for 110 minutes, and then naturally cooling to below 30 ℃;

(5) adding 4 parts of reducing agent sodium sulfite, and uniformly stirring.

Example 4

(1) putting 80 parts of nonylphenol polyoxyethylene ether NP-10 into a reaction kettle, heating to 140 ℃, slowly adding 10 parts of boric acid, and reacting for 80 minutes after the addition is finished;

(2) after the reaction is finished, cooling to 80 ℃, adding 5 parts of auxiliary agent diglycerin, and naturally cooling to normal temperature;

(3) 4 parts of SO are slowly added under a vacuum of 1Pa₃Stirring while adding, heating to 70 ℃ after adding, and reacting for 100 minutes;

(4) after the reaction is finished, cooling to below 50 ℃, adding 5 parts of auxiliary pentaerythritol, reacting for 120 minutes, and then naturally cooling to below 30 ℃;

(5) adding 6 parts of reducing agent ferrous sulfate, and uniformly stirring.

Test example:

the rust remover obtained in example 3 was formulated into an aqueous solution of a certain concentration to perform performance tests, and the test results are shown in table 1.

TABLE 1

Claims

1. A reducing boric sulfate rust remover is characterized by comprising the following preparation steps:

(1) putting 40-80 parts of nonylphenol polyoxyethylene ether into a reaction kettle, heating to 120-140 ℃, slowly adding 1-10 parts of boric acid, and reacting for 80-120 minutes after the addition is finished;

(5) and adding 2-6 parts of a reducing agent, and uniformly stirring.

2. The reducing boron sulfate rust remover according to claim 1, wherein the nonylphenol polyoxyethylene ether is at least one selected from the group consisting of NP-4, NP-7, NP-10, NP-15, NP-20.

3. The reducing boron sulfate rust remover according to claim 1, characterized in that the adjuvant is selected from at least one of propylene glycol, glycerol, diglycerol, sorbitol, epoxidized soybean oil, pentaerythritol, xylitol, mannitol.

4. A reducing borosulphate rust remover according to claim 1, characterised in that the reducing agent is sodium sulphite or ferrous sulphate.

5. The reducing boron sulfate rust remover as claimed in claim 1, wherein the purity of each raw material is 99% or more.