CN101514457B - Multi-purpose metal surface protectant and preparation method thereof - Google Patents
Multi-purpose metal surface protectant and preparation method thereof Download PDFInfo
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- CN101514457B CN101514457B CN2009100218227A CN200910021822A CN101514457B CN 101514457 B CN101514457 B CN 101514457B CN 2009100218227 A CN2009100218227 A CN 2009100218227A CN 200910021822 A CN200910021822 A CN 200910021822A CN 101514457 B CN101514457 B CN 101514457B
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Abstract
The invention relates to a surface protectant mainly used for metal components of electrical appliances and a preparation method thereof. The surface protectant is prepared by 0.1-2% of organic inhibitor, 0.5-3% of film-forming substance, 0.05-0.3% of surfactant and solvent being balance through mixing and heating. The invention adopts an organic solvent as a solvent to prepare the protectant, thus having good dispersive capacity, infiltration capacity and sealing capacity; about 1mum semi-solid hydrophobic film is formed on the metal surface to block micropores on the metal surface, thus preventing harmful gases and other media from eroding the metal and improving the salt fog resistance, moisture resistance and mucedine resistance of the metal as well as the capability of the metal in resisting various severe environments; the film has good adhesive force, thus obviously improving the lubricating property and wearing resistance with no effect on the conductivity. The protectant can be widely applied to the sealing treatment of nickel coating of electronic components or printed circuit boards, aluminum alloy conduction and oxidation, gold plating, stainless steel, copper surface and zinc coating. The surface protectant is simple in production technology, convenient in use and low in cost.
Description
Technical field the present invention relates to a kind of protecting metallic surface agent, specifically a kind of surface protectant that is mainly used in appliance component or printed circuit board and preparation method thereof.
The protection against corrosion problem of background technology metal is a global difficult problem, after metal is corroded, all will change in profile, color and luster, electrical property and mechanical properties, cause damage of facilities, pipe leakage, product contamination, lead to the serious waste of burning or serious accident such as blast and the resource and the energy, make national economy be subjected to tremendous loss.It is estimated that the financial loss that each developed country of the world causes because of metallic corrosion every year accounts for its gross national product 3.5%～4.2%, surpass the summation of annual every terrible disaster (fire, disaster caused by a windstorm and earthquake etc.) loss.For this reason, various countries have all dropped into quite huge manpower, financial resources every year, and the research mechanism of corrosion is taked safeguard procedures.
The surface protection problem of electrical equipment is equally very important.Key element as the structure circuit passband--the surface protection of-electric connector, its condition of surface are the important factors of decision electrical contact reliability.Contact surfaces is in dry condition usually, is very easy to wearing and tearing, adds to be subjected to environment damp and hot salt fog, the SO in the atmosphere
2, H
2S, NO
2Deng the effect of medium, form corrosion thing or oxide compound, contact resistance will become greatly, thus the unstable or interruption that causes electrical signal to become, so that cause the accident.In order to address these problems, three kinds of modes of general employing, a kind ofly be: when electrical contact surface breaks down, cleaned with volatile clean-out system, remove the surface corrosion thing, this method can only play a role in the regular hour, after the clean-out system volatilization, will regenerate some corrosion thing or oxide compounds at electrical contact surface, thereby electrical contact surface is had new influence again, and many clean-out systems contain the haloid element that atmospheric ozone layer is had destruction, should limit its a large amount of uses; The second way is: electrically contacting before components and parts come into operation, at surface applied one deck protective material (dividing two kinds of water-soluble type, solvent-borne types), thereby reach the effect of protection, this mode comparatively speaking, prolonged protective effect to a certain extent, but water-soluble protective material erosion resistance can only satisfy the requirement of low-end product, though the solvent-borne type protective material can satisfy the corrosion proof requirement of high-end product, most of solvent contains the haloid element that atmospheric ozone layer has destruction; The third mode is, uses passivation technology in plating, prolong its solidity to corrosion, but contain heavy metallic salt chromium objectionable impuritiess such as (VI) in most of passivating solution, and it is little to improve corrosion proof effect.Because environment protection requirement; the ROHS of European Union forbids that use contains objectionable impuritiess such as heavy metal chromium, mercury, lead, cadmium and Polybrominated biphenyl, Poly Brominated Diphenyl Ethers in product, also flashes the redlight gradually for the use of haloid element, for this reason; seek the satisfactory protective material of a kind of environmental protection, extremely urgent.
Summary of the invention the objective of the invention is to, and overcomes the problem that contains haloid element and heavy metallic salt in the conventional surface protection, and good organic solvent type protective material of a kind of compliance with environmental protection requirements and corrosion resisting property and preparation method thereof is provided.
The present invention's protective material, by solute---organic inhibitor, filmogen, tensio-active agent and solvent composition.It is composite that organic inhibitor is that a kind of in nitrogen azole, the glyoxaline compound or two kinds carry out, and shared weight ratio is 0.1～2%; Filmogen is the wax material that contains long carbochain, and shared weight ratio is 0.5～3%; Tensio-active agent is the alkyl ether tensio-active agent, and shared weight ratio is 0.05～0.3%; Surplus is hydrocarbon or chain hydrogen class organic solvent.Said filmogen, preferably the long carbochain wax material of several different melting points promptly, can remedy the deficiency of each comfortable anti-corrosion by the difference of fusing point.
Said organic inhibitor is for a kind of of nitrogen azole, glyoxaline compound or two kinds carry out composite;
Said filmogen is for containing the wax material of long carbochain;
Said tensio-active agent is the alkyl ether tensio-active agent;
Said solvent, a kind of in hydrocarbon or the catenanes organic solvent.
The present invention is formulated like this:
A. organic inhibitor, filmogen and tensio-active agent are put in the container, and poured into the solvent of turnout 1/4～1/2;
B. be heated to 40～50 ℃, constant temperature 30～40min reacts synthetic;
C. after being cooled to room temperature, add residual solvent;
D. after stirring, can.
During use, on the workpiece of clean dried, soak, brush, sprayed protection agent → seasoning → packing → accumulating.Can select to soak, brush, spray three kinds of modes respectively according to the size and the shape of workpiece applies.
1. this protectant mechanism of action is:
Protective material is mainly by solute and solvent composition.
Solvent is hydrocarbon or the catenanes solvent.
The composition of solute is inhibiter, filmogen and tensio-active agent.The corrosion inhibition of organic inhibition agent molecule is by the firm absorption of its polarity group at metal material surface, forms effective barrier film, thereby metal and corrosive medium is separated and (being absorption film-forming mechanism) of realizing; Filmogen can the closed metal coating surface micropore, reduce porosity greatly, reduce the galvanic corrosion between metal plating and matrix metal; The adding of tensio-active agent makes the surface of coating back workpiece more smooth, evenly.
Solvent works the medium effect that disperses solute, forms uniform and stable mixture with solute, and after protective material was coated on the metallic surface, solvent volatilized gradually and stays solute, forms protective membrane and plays a protective role.
2. organic inhibitor
Nitrogen azole compounds energy and melts combine are helped ligand, form compact protective film, can significantly strengthen the discoloration-resisting of metal.
Another kind of imidazolidine derivatives can be used as metal corrosion inhibitor, and the number of nitrogen atoms in its molecule is many more, and is stable more with the title complex that metal forms, coordination compound film is also fine and close more, fraction of coverage in the metallic surface is also high more, and its corrosion inhibition rate is also high more, and anti-variable color ability is also strong more.
The tetrahydroglyoxaline molecule is by the atoms metal bonding of two nitrogen-atoms on its five-ring and metallic surface, and the hydrophobic grouping on the tetrahydroglyoxaline molecule is opened in the arrangement of the outside, metallic surface, medium and metallic surface are separated, put on a protection against corrosion " molecule coat " as the metallic surface, make H
3O
+Be difficult near metal, corrosion of metal speed reduces greatly, and the prevention water molecules contacts with the metallic surface.Simultaneously, because organic adsorption film that the tetrahydroglyoxaline molecule forms in the metallic surface has its partial imperfection, this also must cause the local spot corrosion of metal, and adsorption film is easy to desorption.After composite with filmogen, because filmogen equally can be in the metallic surface absorption film-forming, by synergistic effect, not only the local imperfection of adsorption film is improved, and whole even, fine and close, thus good restraining the corrosive generation.
3. filmogen
Filmogen generally all is the wax material that contains long carbochain, can select for use the wax material of one or more different melting points to carry out composite, select for use the different wax material of fusing point can remedy each other defective, frictional dissipation between the contact be can reduce, surface-sealing ability, oilness and wear resisting property strengthened, prevent that corrosive gases from corroding
4. tensio-active agent
The adding of tensio-active agent makes the surface of coating back workpiece more smooth, and evenly, the tensio-active agent in this product also can severally carry out composite use with alkyl oxide or other tensio-active agent.
The invention has the advantages that:
1. improve protective capacities significantly: neutral salt spray test and evidence such as hot and humid, metal of handling through this protective material or encapsulant or coating do not add the metal or the coating of processing than same thickness, have improved resistance to corrosion significantly; At sulfurous gas, hydrogen sulfide, sodium sulphite, potassium sulphide with naturally in the corrosion test such as exposure, have splendid anti-variable color, anticorrosion ability.
2. good lubrication: can reduce the frictional coefficient and the frictional force of metal or coating surface, the action separating force reduces, thereby suppresses wearing and tearing, significant prolongation the work-ing life of electronics such as connector, switch, electrical element.
3. stable electric property: electronics, electrical element are under the lubrication protection; thereby avoid or greatly alleviated manipulating and the detrimentally affect of surrounding environment to its generation; guarantee the reliability of electronics, electrical element effectively, and do not influenced its electroconductibility, insulativity, weldability and high frequency performance.
4. easy use technology: can directly apply under the room temperature, need not preparation, heating and oven dry, and need not to increase a large amount of equipment, personnel.
5. safety, environmental protection: product does not fire not quick-fried, does not contain hazardous and noxious substances such as heavy metal chromium, mercury, lead, cadmium and Polybrominated biphenyl, Poly Brominated Diphenyl Ethers, detects by Switzerland SGS, meets the ROHS of European Union requirement.
The present invention adopts organic solvent to prepare protective material as solvent; have good dispersive ability, penetrating power and sealing ability; can form the semi-solid state hydrophobic film about 1 μ m in the metallic surface; the micropore of blocking metallic surface; thereby prevent the erosion of obnoxious flavour and other medium to metal; improve above-mentioned metal salt fog resistance, wet, the antimycotic ability of moisture resistance, and the ability that improves its anti-various severe environment.And rete has good sticking power; can significantly improve oilness and wear resistance; do not influence electroconductibility; the present invention's protective material; the sealing treatment that is widely used in the nickel coating, aluminium alloy electric conductive oxidation of electronic devices and components or printed circuit board, gold-plated, stainless steel, copper surface and zinc coating; on iron-based nickel plating part; nickel plating 5～10 μ; the salt fog that can reach 72～144h does not have the corrosion variable color, can improve it more than anti-salt fog ability 48～96h at aluminium alloy electric conductive oxidation, gold-plated, stainless steel, copper surface and zinc coating yet.Production technique of the present invention is simple, and is easy to use, and cost is low.
Two embodiments of the invention of narration below the embodiment
The about 1000 kilograms protective material of embodiment 1 preparation.
Carry out the proportioning of each component in following ratio: organic inhibitor is 1 kilogram of triazole, an oleoyl tetrahydroglyoxaline (weight ratio is 1: 3); filmogen is 30 kilograms of ceresine and insect waxes (weight ratio is 1: 2); tensio-active agent OP10 is 0.5 kilogram, and surplus is 968.5 kilograms of hydrocarbon solvents.
The process for preparation of this embodiment is:
1. the solvent of the organic inhibitor of aforementioned proportion, filmogen, tensio-active agent and above-mentioned 1/4 is poured in the reactor;
2. be heated to 40-42 ℃, constant temperature 30-32min;
3. after being cooled to room temperature, adding residual solvent and continue to stir;
4. after stirring, can.
The about 1000 kilograms protective material of embodiment 2 preparations.
Carry out the proportioning of each component in following ratio: organic inhibitor is 20 kilograms of benzotriazoles, and filmogen is 5 kilograms of insect waxes, and tensio-active agent OP10 is 3 kilograms, and surplus is 972 kilograms of chain hydrocarbon solvents.
The process for preparation of this embodiment is:
1. the solvent of the organic inhibitor of aforementioned proportion, filmogen, tensio-active agent and above-mentioned 1/2 is poured in the reactor;
2. be heated to 48-50 ℃, constant temperature 38-40min;
3. after being cooled to room temperature, adding residual solvent and continue to stir;
4. after stirring, can.
Claims (2)
1. multi-purpose metal surface protectant is characterized in that, by solute organic inhibitor, filmogen, tensio-active agent and solvent composition, proportioning therebetween is:
(a) the shared weight ratio of organic inhibitor is 0.1～2%;
(b) the shared weight ratio of filmogen is 0.5～3%;
(c) the shared weight ratio of tensio-active agent is 0.05～0.3%;
(d) surplus is a solvent.
Said organic inhibitor is for a kind of of nitrogen azole, glyoxaline compound or two kinds carry out composite;
Said filmogen is for containing the wax material of long carbochain;
Said tensio-active agent is the alkyl ether tensio-active agent;
Said solvent is the catenanes organic solvent.
2. according to the preparation method of the described multi-purpose metal surface protectant of claim 1, it is characterized in that, carry out according to following step:
A. organic inhibitor, filmogen and tensio-active agent are put in the container, and poured into the solvent of turnout 1/4～1/2;
B. be heated to 40～50 ℃, constant temperature 30～40min;
C. after being cooled to room temperature, add residual solvent;
D. after stirring, can.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100218227A CN101514457B (en) | 2009-04-02 | 2009-04-02 | Multi-purpose metal surface protectant and preparation method thereof |
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| CN2009100218227A CN101514457B (en) | 2009-04-02 | 2009-04-02 | Multi-purpose metal surface protectant and preparation method thereof |
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| CN101514457A CN101514457A (en) | 2009-08-26 |
| CN101514457B true CN101514457B (en) | 2011-09-14 |
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| CN101792922B (en) * | 2010-04-12 | 2011-12-21 | 北京航空航天大学 | Anticorrosive sealing liquid and method for sealing anodic oxide film containing copper-aluminium alloy by utilizing same |
| CN102162095B (en) * | 2011-03-01 | 2012-08-08 | 济南德锡科技有限公司 | Anti-discoloring protective agent for silver plating and preparation method as well as application method thereof |
| CN103147075B (en) * | 2011-12-07 | 2016-04-27 | 西安创联华特表面处理技术有限责任公司 | A kind of water-soluble copper facing protective material and preparation method thereof |
| CN103088375B (en) * | 2012-12-13 | 2016-04-06 | 苏州赛斯德工程设备有限公司 | Water electrolysis pole plate nickel plating additive |
| CN103014717B (en) * | 2012-12-24 | 2014-07-16 | 国家海洋局天津海水淡化与综合利用研究所 | Method for modifying organic corrosion inhibitor by magnetic functionalization |
| CN103436887A (en) * | 2013-07-29 | 2013-12-11 | 佛山通宝精密合金股份有限公司 | Surface protectant for alloy contact element, and treatment process of surface protectant |
| CN105937036A (en) * | 2016-06-28 | 2016-09-14 | 常州大学 | Rust prevention method for outdoor current transformer |
| CN106047127A (en) * | 2016-08-17 | 2016-10-26 | 安徽红桥金属制造有限公司 | Sealing agent for corrosion resistance of zinc-plated spring and preparation method thereof |
| CN106435688A (en) * | 2016-09-30 | 2017-02-22 | 湖北奥美伦科技有限公司 | Novel aluminum anodic oxidation close ash removing agent and preparation method and application process thereof |
| CN109097759B (en) * | 2018-09-19 | 2019-07-26 | 深圳市傲新源科技有限公司 | A kind of gold and silver coating Anti- tarnishing protective agent and preparation method thereof and application method |
| CN110230061A (en) * | 2019-06-26 | 2019-09-13 | 珠海横琴思国科技发展有限公司 | A kind of gold and silver surface anti-oxidation Anti- tarnishing protective agent and its preparation method and application |
| CN112647082B (en) * | 2020-12-11 | 2022-10-28 | 中国航发北京航空材料研究院 | Electronic equipment corrosion inhibitor and preparation method thereof |
| CN113755829B (en) * | 2021-08-16 | 2024-05-07 | 深圳市志凌伟业技术股份有限公司 | Blackening-treated copper film surface anti-corrosion protection liquid medicine |
| CN114481109B (en) * | 2021-12-09 | 2024-03-22 | 温州安能科技有限公司 | Aluminum alloy wire surface reaction film treatment liquid and treatment process thereof |
| CN115044894B (en) * | 2022-06-22 | 2024-05-07 | 西安创联华特表面处理技术有限责任公司 | Water-based protective agent shared by gold and tin plating layers and preparation method thereof |
| CN115304945B (en) * | 2022-09-19 | 2023-08-18 | 厦门竞高电镀有限公司 | Environment-friendly gold-plating protection liquid and preparation method thereof |
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