CN104862680A - Anti-oxidation metal surface treatment agent - Google Patents

Abstract

The invention discloses an anti-oxidation metal surface treatment agent. The anti-oxidation metal surface treatment agent consists of the following raw materials in parts by weight: 13-20 parts of polyvinyl alcohol, 0.4-1 part of tea saponin, 0.8-1 part of sodium citrate, 0.2-0.3 part of lauryl mercaptan, 0.1-0.3 part of 2-thiol group benzimidazole, 0.1-0.2 part of antioxidant BHT, 0.4-1 part of calcium lignosulphonate, 2-3 parts of amino tri(methylene phosphonic acid), 6-8 parts of sericin, 0.08-0.1 part of boric acid, 10-20 parts of methyl benzotriazole, and 180-200 parts of de-ionized water. The water soluble high-molecular polyvinyl alcohol is mixed with the sericin and is modified by the boric acid to improve the tensile strength and the heat stability of a blended membrane; corrosion inhibition alkali liquid using the methyl benzotriazole as a main material is added, so that the film attached on the metal surface is more uniform and stable to protect a metal material from being corroded by harmful media in atmosphere and water so as to achieve a better corrosion inhibition effect; and the added 2-thiol group benzimidazole and antioxidant BHT can improve the oxidation resistance of the metal surface treatment agent.

Description

A kind of anti-oxidation metal surface treatment agent

Technical field

The present invention relates generally to metal conditioner field, particularly relates to a kind of anti-oxidation metal surface treatment agent.

Background technology

Metal conditioner refers to the general name of chemical agent metallic surface being carried out to various process.Metal finishing includes oil removing, rust cleaning, phosphatization, the substrate pretreatment such as antirust, for metal coating techniques, metal protection technology are prepared, the use of substrate pretreatment quality to after this coating preparation and metal has a great impact, water soluble anti-rust agent wherein then may be dissolved in water and forms the aqueous solution, and metal can prevent rust corrosion after this aqueous solution process.Their rust inhibition can be divided three classes.

1. metal and rust-preventive agent generate the insoluble and sull of densification, thus prevent the anode dissolution of metal or promote the passivation of metal, thus suppressing corrosion of metal.This kind of rust-preventive agent is also called passivator, as Sodium Nitrite, potassium bichromate etc.In use, enough consumptions should be ensured.When using quantity not sufficient, can not form complete sull, on not covered very little metallic surface, corrosion electric current density increases, and easily causes severe local corrosion.2. metal and rust-preventive agent generate the salt of indissoluble, thus metal and corrosive medium are isolated, and avoid corrosion.Such as: the phosphoric acid salt had can generate insoluble phosphoric acid molysite with iron effect; Some silicate energy and iron, aluminium effect generate insoluble silicate etc.3. metal and rust-preventive agent generate the complex compound of insoluble, cover metallic surface and protect metal to avoid corrosion.Such as: benzotriazole and copper can generate inner complex Cu (C6H4N3) 2, be both water insolublely also insoluble to oil, thus can protect the surface of copper.

Summary of the invention

The object of the invention is just to provide a kind of anti-oxidation metal surface treatment agent.

The present invention is achieved by the following technical solutions:

A kind of anti-oxidation metal surface treatment agent, it is made up of the raw material of following weight parts:

Polyvinyl alcohol 13-20, tea saponin 0.4-1, Sodium Citrate 0.8-1, lauryl mercaptan 0.2-0.3,2-thiol group benzimidazolyl 0.1-0.3, antioxidant BHT 0.1-0.2, calcium lignin sulphonate 0.4-1, Amino Trimethylene Phosphonic Acid 2-3, silk gum 6-8, boric acid 0.08-0.1, methyl benzotriazazole 10-20, deionized water 180-200.

A preparation method for anti-oxidation metal surface treatment agent, is characterized in that comprising the following steps:

(1) by silk gum, Sodium Citrate mixing, add the 50-60% of above-mentioned deionized water weight, after stirring, add polyvinyl alcohol, boric acid, insulated and stirred 50-60 minute at 65-70 DEG C, add 2-thiol group benzimidazolyl, be stirred to normal temperature, obtain silk gum emulsion;

(2) methyl benzotriazazole is joined in its weight 3-5 sig water doubly, be heated to 60-70 DEG C, add antioxidant BHT, tea saponin, stir, obtain inhibition alkali lye;

(3) by above-mentioned inhibition alkali lye, the mixing of silk gum emulsion, 100-200 rev/min of dispersed with stirring 10-13 minute, obtains inhibition emulsion;

(4) by Amino Trimethylene Phosphonic Acid, calcium lignin sulphonate mixing, be heated to 60-70 DEG C, insulated and stirred 4-6 minute, add lauryl mercaptan and remaining deionized water, be stirred to normal temperature, add above-mentioned inhibition emulsion to mix with each raw material of residue, 700-800 rev/min of dispersed with stirring 20-30 minute, obtains described metal conditioner.

A kind of silk gum film forming metal surface treatment agent, described sig water is the sodium hydroxide of 0.1mol/l or the aqueous sodium carbonate of 0.1mol/l.

Advantage of the present invention is:

Water-soluble polymer polyvinyl alcohol mixes with silk gum by the present invention; by boric acid modified tensile strength and the thermostability that can improve blend film; adding with methyl benzotriazazole is the inhibition alkali lye of major ingredient; the film being adsorbed on metallic surface can be made more uniform and stable; protection metallic substance is from the corrosion of hazardous medium in air and water; play better corrosion mitigating effect, the 2-thiol group benzimidazolyl added, antioxidant BHT can improve the oxidation-resistance of metal conditioner.

Embodiment

Embodiment 1:

A kind of anti-oxidation metal surface treatment agent, it is made up of the raw material of following weight parts:

Polyvinyl alcohol 20, tea saponin 0.4, Sodium Citrate 0.8, lauryl mercaptan 0.3,2-thiol group benzimidazolyl 0.3, antioxidant BHT 0.2, calcium lignin sulphonate 0.4, Amino Trimethylene Phosphonic Acid 2, silk gum 6, boric acid 0.08, methyl benzotriazazole 20, deionized water 200.

A preparation method for anti-oxidation metal surface treatment agent, comprises the following steps:

(1) by silk gum, Sodium Citrate mixing, add 60% of above-mentioned deionized water weight, add polyvinyl alcohol, boric acid after stirring, insulated and stirred 60 minutes at 70 DEG C, adds 2-thiol group benzimidazolyl, is stirred to normal temperature, obtain silk gum emulsion;

(2) methyl benzotriazazole is joined in the sig water of its weight 5 times, be heated to 70 DEG C, add antioxidant BHT, tea saponin, stir, obtain inhibition alkali lye;

(3) by above-mentioned inhibition alkali lye, the mixing of silk gum emulsion, 200 revs/min of dispersed with stirring 13 minutes, obtain inhibition emulsion;

(4) by Amino Trimethylene Phosphonic Acid, calcium lignin sulphonate mixing, be heated to 70 DEG C, insulated and stirred 6 minutes, add lauryl mercaptan and remaining deionized water, be stirred to normal temperature, add above-mentioned inhibition emulsion to mix with each raw material of residue, 800 revs/min of dispersed with stirring 20 minutes, obtain described metal conditioner.

A kind of silk gum film forming metal surface treatment agent, described sig water is the sodium hydroxide of 0.1mol/l or the aqueous sodium carbonate of 0.1mol/l.

Performance test:

Performance test:

Get that surface treatment agent of the present invention processes aluminium alloy respectively, copper-iron alloy sheet material is tested, the specification of two kinds of sheet materials is 80mm × 100mm × 4mm, by this sheet material lateral dissection, carry out spray test, agents useful for same to be concentration be 5% sodium chloride solution, test period 300 hours, measure the bubbling width formed in line of cut side, result bubbling width is 0;

Salt tolerance:

It is in the sodium chloride solution of 5% that the above-mentioned two kinds of sheet materials processed respectively are immersed in concentration, and soak 300 hours, material surface is substantially unchanged, soaks 300 hours, occurs without rust staining.

Claims (3)

1. an anti-oxidation metal surface treatment agent, is characterized in that what it was made up of the raw material of following weight parts:

Polyvinyl alcohol 13-20, tea saponin 0.4-1, Sodium Citrate 0.8-1, lauryl mercaptan 0.2-0.3,2-thiol group benzimidazolyl 0.1-0.3, antioxidant BHT 0.1-0.2, calcium lignin sulphonate 0.4-1, Amino Trimethylene Phosphonic Acid 2-3, silk gum 6-8, boric acid 0.08-0.1, methyl benzotriazazole 10-20, deionized water 180-200.

2. a preparation method for anti-oxidation metal surface treatment agent as claimed in claim 1, is characterized in that comprising the following steps:

(1) by silk gum, Sodium Citrate mixing, add the 50-60% of above-mentioned deionized water weight, after stirring, add polyvinyl alcohol, boric acid, insulated and stirred 50-60 minute at 65-70 DEG C, add 2-thiol group benzimidazolyl, be stirred to normal temperature, obtain silk gum emulsion;

(2) methyl benzotriazazole is joined in its weight 4-5 sig water doubly, be heated to 60-70 DEG C, add antioxidant BHT, tea saponin, stir, obtain inhibition alkali lye;

(3) by above-mentioned inhibition alkali lye, the mixing of silk gum emulsion, 100-200 rev/min of dispersed with stirring 10-13 minute, obtains inhibition emulsion;

(4) by Amino Trimethylene Phosphonic Acid, calcium lignin sulphonate mixing, be heated to 60-70 DEG C, insulated and stirred 4-6 minute, add lauryl mercaptan and remaining deionized water, be stirred to normal temperature, add above-mentioned inhibition emulsion to mix with each raw material of residue, 700-800 rev/min of dispersed with stirring 20-30 minute, obtains described metal conditioner.

3. a kind of silk gum film forming metal surface treatment agent according to claim 1, is characterized in that described sig water is the sodium hydroxide of 0.1mol/l or the aqueous sodium carbonate of 0.1mol/l.