CN104818471A - Sericin rare-earth metal surface treatment agent - Google Patents

Abstract

The invention discloses a sericin rare-earth metal surface treatment agent which is composed of the following raw materials, by weight, 0.1-0.2 part of polyglutamic acid, 10-15 parts of polyvinyl alcohol, 4-6 parts of sericin, 0.07-0.1 part of boric acid, 0.05-0.1 part of yttrium nitrate hexahydrate, 0.4-1 part of a silane coupling agent KH-550, 150-200 parts of water, 0.1-0.3 part of diazolidinyl urea, 1-2 parts of sodium acid pyrophosphate, 2-4 parts of triethanolamine borate, 0.2-0.3 part of hexamethylphosphoramide and 1-2 parts of octoxinol. After hydrolysis of silane, an adsorption type film can be formed on metal surface so as to isolate water molecules and oxygen molecules in the environment, thus having a protective effect. Through boric acid modification, tensile strength and heat stability of blend films can be enhanced. The added rare earth metal ions and OH- generated by oxygen absorption corrosion of the metal substrate surface undergo complexing to generate insoluble complexes. The complexes can alleviate the electrode reaction of corrosion.

Description

A kind of silk gum rare earth metal surface treatment agent

Technical field

The present invention relates generally to metal conditioner field, particularly relates to a kind of silk gum rare earth 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 silk gum rare earth metal surface treatment agent.

The present invention is achieved by the following technical solutions:

A kind of silk gum rare earth metal surface treatment agent, it is made up of the raw material of following weight parts:

Polyglutamic acid 0.1-0.2, polyvinyl alcohol 10-15, silk gum 4-6, boric acid 0.07-0.1, six water Yttrium trinitrate 0.05-0.1, silane resin acceptor kh-550 0.4-1, water 150-200, two Imidurea 0.1-0.3, trisodium phosphate 1-2, Triethanolamine borate 2-4, hexamethylphosphoramide 0.2-0.3, octoxinol 1-2.

2, a preparation method for silk gum rare earth metal surface treatment agent as claimed in claim 1, is characterized in that comprising the following steps:

(1) get silk gum, add the 30-40% of above-mentioned water weight, add silane resin acceptor kh-550, six water Yttrium trinitrates after stirring, 600-1000 rev/min of dispersed with stirring 10-20 minute, obtains silane liquid;

(2) by polyglutamic acid, the mixing of two Imidurea, add the 40-50% of residue water weight, be uniformly mixed 6-10 minute, obtain preservative solution;

(3) get the 10-20% of above-mentioned polyvinyl alcohol weight, add trisodium phosphate and remaining water, be heated to 60-70 DEG C, add Triethanolamine borate, insulated and stirred 20-30 minute, obtain rust protection liquid;

(4) get above-mentioned silane liquid, add remaining polyvinyl alcohol, boric acid, insulated and stirred 60-70 minute at 65-70 DEG C, add preservative solution, rust protection liquid, 600-1000 rev/min of dispersed with stirring 10-20 minute, obtains silk gum emulsion;

(5) above-mentioned silk gum emulsion mixed with each raw material of residue, 800-1000 rev/min of dispersed with stirring 30-40 minute, obtains described metal conditioner.

Advantage of the present invention is:

Silane of the present invention can form adsorptive type rete in metallic surface after hydrolyzing, thus water molecules in isolated environment and oxygen molecule play protective effect, then by boric acid modified tensile strength and the thermostability that can improve blend film, and the rare earth ion added can corrode with metallic substrate surface generation oxygen uptake the OH produced ^-complexing produces insoluble complex, and this complex compound dehydration can form oxide precipitation to substrate surface, the electrode reaction of slowing down corrosion further.

Embodiment

Embodiment 1:

A kind of silk gum rare earth metal surface treatment agent, it is made up of the raw material of following weight parts:

Polyglutamic acid 0.2, polyvinyl alcohol 15, silk gum 4, boric acid 0.07, six water Yttrium trinitrate 0.05, silane resin acceptor kh-550 0.4, water 200, two Imidurea 0.3, trisodium phosphate 2, Triethanolamine borate 2, hexamethylphosphoramide 0.3, octoxinol 1.

A preparation method for silk gum rare earth metal surface treatment agent, comprises the following steps:

(1) get silk gum, add 40% of above-mentioned water weight, add silane resin acceptor kh-550, six water Yttrium trinitrates after stirring, 600 revs/min of dispersed with stirring 10 minutes, obtain silane liquid;

(2) by polyglutamic acid, the mixing of two Imidurea, add 50% of residue water weight, be uniformly mixed 6-10 minute, obtain preservative solution;

(3) get 20% of above-mentioned polyvinyl alcohol weight, add trisodium phosphate and remaining water, be heated to 70 DEG C, add Triethanolamine borate, insulated and stirred 30 minutes, obtains rust protection liquid;

(4) get above-mentioned silane liquid, add remaining polyvinyl alcohol, boric acid, at 65 DEG C, insulated and stirred 70 minutes, adds preservative solution, rust protection liquid, and 1000 revs/min of dispersed with stirring 20 minutes, obtain silk gum emulsion;

(5) above-mentioned silk gum emulsion mixed with each raw material of residue, 1000 revs/min of dispersed with stirring 40 minutes, obtain described metal conditioner.

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 (2)

1. a silk gum rare earth metal surface treatment agent, is characterized in that what it was made up of the raw material of following weight parts:

Polyglutamic acid 0.1-0.2, polyvinyl alcohol 10-15, silk gum 4-6, boric acid 0.07-0.1, six water Yttrium trinitrate 0.05-0.1, silane resin acceptor kh-550 0.4-1, water 150-200, two Imidurea 0.1-0.3, trisodium phosphate 1-2, Triethanolamine borate 2-4, hexamethylphosphoramide 0.2-0.3, octoxinol 1-2.

2. a preparation method for silk gum rare earth metal surface treatment agent as claimed in claim 1, is characterized in that comprising the following steps:

(1) get silk gum, add the 30-40% of above-mentioned water weight, add silane resin acceptor kh-550, six water Yttrium trinitrates after stirring, 600-1000 rev/min of dispersed with stirring 10-20 minute, obtains silane liquid;

(2) by polyglutamic acid, the mixing of two Imidurea, add the 40-50% of residue water weight, be uniformly mixed 6-10 minute, obtain preservative solution;

(3) get the 10-20% of above-mentioned polyvinyl alcohol weight, add trisodium phosphate and remaining water, be heated to 60-70 DEG C, add Triethanolamine borate, insulated and stirred 20-30 minute, obtain rust protection liquid;

(4) get above-mentioned silane liquid, add remaining polyvinyl alcohol, boric acid, insulated and stirred 60-70 minute at 65-70 DEG C, add preservative solution, rust protection liquid, 600-1000 rev/min of dispersed with stirring 10-20 minute, obtains silk gum emulsion;

(5) above-mentioned silk gum emulsion mixed with each raw material of residue, 800-1000 rev/min of dispersed with stirring 30-40 minute, obtains described metal conditioner.