CN101298679B

CN101298679B - Metal antirust agent

Info

Publication number: CN101298679B
Application number: CN200810028936XA
Authority: CN
Inventors: 阎继红; 黄津华
Original assignee: GUANGZHOU JIASHIJIE ENVIRONMENT PROTECTION TECHNOLOGY Co Ltd
Current assignee: GUANGZHOU JIASHIJIE ENVIRONMENT PROTECTION TECHNOLOGY Co Ltd
Priority date: 2008-06-19
Filing date: 2008-06-19
Publication date: 2010-09-15
Anticipated expiration: 2028-06-19
Also published as: CN101298679A

Abstract

The invention discloses a metallic antirust agent, which is characterized in that the metallic antirust agent is prepared by following raw materials by weight: 30 to 40 percent of morpholine, 10 to 15 percent of 1, 3 ketoglutarate morpholine, 5 to 8 percent of boric acid morpholine, 0.3 to 0.5 percent of benzotriazole and residual quantity of water. The metallic antirust agent of the invention has good antirust effect for cast iron, better applicability to copper and aluminum, and better compatibility with compressor working substances and refrigerant oil, is applicable to the rust resistancebetween working procedures and the final rust resistance in the field of compressors, has lower residual rate and better compatibility with the compressor working substances, can form ultra-thin antirust films, realize the rust resistance between the working procedures and achieve long antirust time which lasts for over 3 months, and has better applicability to copper and aluminum; simultaneouslythe metallic antirust agent does not contain substances that are harmful to human bodies, is nontoxic and harmless to human bodies, and has good environmental protection effect.

Description

Metal antirusting agent

Technical field

The present invention relates to a kind of rust-preventive agent, particularly a kind of rust prevention during manufacture and final antirust metal antirusting agent that is applicable to the compressor industry.

Background technology

In metal-processing industry, rust-preventive agent is widely used in rust prevention during manufacture and finally antirust, uses water-based antirust in the metal rust preventing operation, not only can improve and simplify technological process, and can reduce production costs.The water-based antirust of each national capital active development suitable metal processing in recent years is to satisfy the requirement of metal-processing industry each side.

It is matrix that water-based antirust is meant with water, adds a certain amount of water soluble rust inhibitor and the aqueous rust preventive solution that is mixed with.Inhibiter is divided into inorganic inhibitor (as oxygenant NO ₃ ^-, NO ₂ ^-, CrO ₄ ^2-, Cr ₂O ₇ ^2-Phosphoric acid salt, polyphosphate, silicate molybdate etc.) and organic inhibitor (comprising all organism of N, S such as amine, aldehydes, heterogeneous ring compound, imidazolium compounds, sulfide, O).

In refrigerator, compressor of air conditioner manufacturing, require very high to water-based antirust, 1, require the residue of rust-preventive agent few, and have favorable compatibility with compressor working medium, and inorganic inhibitor, corrosion mitigating effect is poor, consumption is big, residue is many, and is incompatible with compressor working medium, can cause bad influence; 2, prevent that the embroidery time is long, and copper, aluminium are had adaptability preferably, the compressor components material has cast iron, copper, aluminium, so rust-preventive agent will have good rust-preventing characteristic to cast iron, prevents the embroidery time more than three months, and also adaptability preferably will be arranged to copper, aluminium; 3, when formulating prescription, also must consider product cost, to factors such as human body are nontoxic, harmless.

In refrigerator, compressor of air conditioner manufacturing, external water-based antirust product monopolizes China's rust-preventive agent in the market that compressor is made industry at present, and costing an arm and a leg of import rust-preventive agent increases the compressor manufacturing cost.And the rust-preventive agent of domestic production generally has following defective: foreign matter is arranged: cause compressor performance bad, cause compressor stuck, cause compressor to be scrapped; Rustless property is poor, easily gets rusty, cause the compressor impurity content exceeding index, cause compressor performance bad, cause compressor to be scrapped; Residue is incompatible: destroy refrigerator oil, cause compressor because of lubricated bad, performance is bad or transship, destroy refrigeration agent, cause that compressor is scrapped etc.

Summary of the invention

In order to overcome the deficiencies in the prior art, the invention provides a kind of do not have foreign matter, good antirust property, residual less relatively, compatible and cost is low, the metal antirusting agent of environmental protection with compressor working medium.

The technical solution adopted for the present invention to solve the technical problems is:

Metal antirusting agent, it is characterized in that it is to be made by following raw materials by weight percent: morpholine 30～40%, 1,3 pentanedioic acid morpholine 10～15%, boric acid morpholine 5～8%, benzotriazole 0.3～0.5%, surplus is a water.

Described 1,3 pentanedioic acid morpholines are that weight ratio is respectively 45～60% morpholine and 55～40%1, the product that the reaction of 3 pentanedioic acids obtains, it can adopt following method preparation: add morpholine and 1 in proportion, 3 pentanedioic acids stir and heat and are warming up to boiling, and controlled temperature stops heating at 140～150 ℃ when a large amount of gases produce, make its natural reaction can obtain 1,3 pentanedioic acid morpholine about 60 minutes.

Described boric acid morpholine is that weight ratio is the product behind the acid reaction of 55～70% morpholine and 30～45%, it can be prepared as follows: add morpholine and boric acid in proportion, stir also heat temperature raising to 140～160 ℃ insulation 2 hours, rotation is cooled to 50～60 ℃ and can obtains the boric acid morpholine.

This rust-preventive agent is colourless or light yellow transparent liquid, and pH value is 10.5 ± 0.5, density 1.05 ± 0.05g/cm ³

Rust-preventive agent of the present invention can be prepared as follows: add the morpholine stirring in pure water it is dissolved fully, add 1 again, 3 pentanedioic acid morpholines are stirred to fully dissolving, add the boric acid morpholine then and are stirred to dissolving fully, add benzotriazole at last and are stirred to fully that dissolving gets final product.

The present invention can adopt direct immersion, method ultrasonic, spray that equipment is carried out antirust processing.

Rust-proof mechanism of the present invention is: organic inhibitor is adsorbed on the metallic surface and forms the successive adsorption layer, corrosive medium and metal is isolated, thereby play rust prevention.The molecule of organic inhibitor is made up of two portions: a part is easily by the hydrophilic polar group of metal adsorption, and another part is hydrophobic or lipophilic organic atomic group (as alkyl).One end of polar group is adsorbed by the metallic surface, and outside formation of a hydrophobic end aligns, and corrosive medium is just squeezed away by the inhibiter molecule as a result, and medium and metallic surface are separated, and plays the protection metal function.The central atom N of polar group contains solely electronics, and it carries out coordination with the d electronics unoccupied orbital of metal and combines, and these atoms of S and O also all contain lone-pair electron, so can both carry out chemisorption in the metallic surface.

The invention has the beneficial effects as follows: metal antirusting agent of the present invention has good rust-proof effect to cast iron, and to copper, aluminium has adaptability preferably, with compressor working medium, refrigerator oil has favorable compatibility, the rust prevention during manufacture that is applicable to the compressor industry reaches finally antirust, its residual rate is lower, and has favorable compatibility with compressor working medium, can form anti-rust film as thin as a wafer, the tool rust prevention during manufacture, the anti-embroidery time is long, can reach more than 3 months, and to copper, aluminium has adaptability preferably, the present invention does not simultaneously contain harmful material, and is nontoxic to human body, harmless, have good environment protecting.

The present invention is further described below in conjunction with embodiment.

Embodiment

Embodiment 1

In a reaction vessel, add 550 kilograms of morpholines and 450 kilogram 1,3 pentanedioic acids stir and heat and are warming up to boiling, and controlled temperature stops heating at 140～150 ℃ when a large amount of gases produce, it is standby to make its natural reaction obtain 1,3 pentanedioic acid morpholine about 60 minutes; Add 600 kilograms of morpholines and 400 kilograms of boric acid in another reaction vessel, stir and heat temperature raising to 140～160 ℃ insulation 2 hours, rotation is cooled to 50～60 ℃, and to obtain the boric acid morpholine standby.

Embodiment 2

Adding 35 kilograms of morpholines stirrings in 44.7 kilograms of pure water dissolves it fully, add 1 of 13 kilograms of embodiment, 1 preparation again, 3 pentanedioic acid morpholines are stirred to dissolving fully, the boric acid morpholine that adds 7 kilograms of embodiment 1 preparation then is stirred to dissolving fully, adds 0.3 kilogram of benzotriazole at last and is stirred to fully that dissolving can obtain metal antirusting agent of the present invention.

Embodiment 3

Adding 40 kilograms of morpholines stirrings in 42.7 kilograms of pure water dissolves it fully, add 1 of 12 kilograms of embodiment, 1 preparation again, 3 pentanedioic acid morpholines are stirred to dissolving fully, the boric acid morpholine that adds 5 kilograms of embodiment 1 preparation then is stirred to dissolving fully, adds 0.3 kilogram of benzotriazole at last and is stirred to fully that dissolving can obtain metal antirusting agent of the present invention.

Embodiment 4

Adding 38 kilograms of morpholines stirrings in 44.2 kilograms of pure water dissolves it fully, add 1 of 11 kilograms of embodiment, 1 preparation again, 3 pentanedioic acid morpholines are stirred to dissolving fully, the boric acid morpholine that adds 6.5 kilograms of embodiment 1 preparation then is stirred to dissolving fully, adds 0.3 kilogram of benzotriazole at last and is stirred to fully that dissolving can obtain metal antirusting agent of the present invention.

The comparative example

Get the metal antirusting agent of embodiment 3 preparations and the rust-preventive agent product of German import and carry out the contrast experiment on performance, wherein every performance index are measured respectively as follows:

High low-temperature stability: undertaken by JB/T4323.2-1999.

Damp and hot rust prevention test: the test piece of one-level grey cast iron is soaked 1min in 50～70 ℃ rust protection liquid, take out oven dry (110 ℃), test piece is put on the dividing plate of moisture eliminator (500～1000ml distilled water is injected in the bottom), add a cover and be placed on constant temperature placement under 35 ℃ ± 2 ℃ conditions.Observe the antirust time.

Corrosion test: undertaken by JB/T4323.2-1999.

Indoor hanging test: the test piece of one-level grey cast iron hangs up in indoor (Guangzhou) after antirust processing, observes test piece surface corrosion situation.

Seal rust prevention test up for safekeeping: the test piece of one-level grey cast iron is put into transparent sealed plastic bag with test piece after antirust processing, the surface appearance of good seal routine observation test piece.

Machine test on the workshop: in Panasonic's ten thousand treasured (Guangzhou) compressor company limited, by the final cleaning of this company, last machine is on probation, antirust, dry after, leave in the Workpiece storage storehouse.Observe the antirust time.

Compatible test: entrust Panasonic's ten thousand treasured (Guangzhou) compressor company limited sample presentation to detect to Japan.

Measurement result sees Table one:

Table one

As shown in Table 1, the present invention and compressor working medium have favorable compatibility, and the anti-embroidery time is long, can reach more than 3 months, and copper, aluminium are had adaptability preferably, the present invention simultaneously is nontoxic, harmless to human body, have good environment protecting, its rustless property has reached external imported product.

Claims

1. metal antirusting agent is characterized in that it is to be made by following raw materials by weight percent: morpholine 30～40%, 1,3 pentanedioic acid morpholine 10～15%, boric acid morpholine 5～8%, benzotriazole 0.3～0.5%, and surplus is a water; Wherein said 1,3 pentanedioic acid morpholine is that weight ratio is respectively 45～60% morpholine and 55～40%1, the product that the reaction of 3 pentanedioic acids obtains; Described boric acid morpholine is the respectively product behind 55～70% morpholine and 30～45% the acid reaction of weight ratio.

2. metal antirusting agent according to claim 1 is characterized in that this rust-preventive agent is colourless or light yellow transparent liquid, and pH value is 10.5 ± 0.5, density 1.05 ± 0.05g/cm ³