The antirust non-freezing solution of polyaniline
Technical field
The invention belongs to radiator and use the non-freezing solution field, in order to improve the Corrosion Protection of product.
Background technology
At present, the automobile non-freezing solution on the China market, great majority are that to dose the organic anti-corrosive agent with ethylene glycol be major product.The shortcoming that exists is: organic anti-corrosive agent and ethylene glycol is very easily acidifying under 80 ℃ temperature, and causes the corrosion to radiator recycle pump and engine cylinder-body.Generally speaking, our non-freezing solution bought from the market meets national standard after testing.But, in radiator, to use after three months and detect again, considerable change has taken place in product performance aspect antiseptic property.After using three months, still continue the non-freezing solution difficult quality guarantee of use in other words.
Summary of the invention
The invention provides the antirust non-freezing solution of a kind of polyaniline, to solve the problem of present deicing fluid rustless property difference.The technical scheme that the present invention takes is: the component of following weight percent is formed:
Polyaniline aqueous sanitas 1~3%
Ethylene glycol non-freezing solution 97~99%.
The wherein preparation of anticorrosive polyaniline agent prepares the anticorrosive polyaniline agent by the following method:
With 10 gram polyaniline in eigenstate, 1 gram Sulfuric acid disilver salt, join in 100 grams, 23% the sulfuric acid, under 90 ℃ temperature, stirred 2 hours, filtration washing to be cooled repeatedly three times to neutral, obtain about 50 gram black pastes; Get this slurry 4 grams, add deionized water 10 grams, add caustic soda 0.2 gram, pH value is transferred to 8-9, and then add 1 gram borax, stirred 1.5 hours with 1700 rev/mins, make it dissolving with high speed dispersor; Add zinc sulfate 0.004 gram again, Sodium Nitrite 0.35 restrains, Sodium Benzoate 0.4 gram, and ethanol 0.02 gram continues with high speed dispersor with the extremely dissolving of 1700 rev/mins of high speed dispersion.
Important embodiment of the present invention is:
Component by following weight percent is formed:
Polyaniline aqueous sanitas 1%
Ethylene glycol non-freezing solution 99%.
The ethylene glycol non-freezing solution is made up of the component of following weight percent among the present invention:
Ethylene glycol 35~60%
Distilled water 40~65%.
The invention has the advantages that: with the compound of polyaniline aqueous sanitas, effectively prevented the acidifying of original ethylene glycol and organic anti-corrosive agent, solved the bad problem of present automobile non-freezing solution rustless property as the ethylene glycol non-freezing solution.Simultaneously, scale inhibitor and defoamer be needn't dose again, antiscale, non-foaming technical requirements also can be reached.It is the splendid new automobile water tank non-freezing solution of a kind of ideal, preservative effect.
Technical indicator: freezing point :-20 ℃-45 ℃, boiling point: 108 ℃, the automobile organic coating is influenced: do not have, pH value 8-9, the foam tendency: foams and<80ml lather collapse time<3s.
The glassware corrosion experiment:
Test piece test piece value amount changing value: mg/ sheet
Red copper-0.8
Brass-1.2
Steel-2.1
Cast iron+1.6
Scolding tin-2.3
Cast aluminium+4.2
Embodiment
Embodiment 1:
The preparation of anticorrosive polyaniline agent: prepare the anticorrosive polyaniline agent by the following method.
With 10 gram polyaniline in eigenstate, 1 gram Sulfuric acid disilver salt, join in 100 grams, 23% the sulfuric acid, under 90 ℃ temperature, stirred 2 hours, filtration washing to be cooled repeatedly three times to neutral, obtain about 50 gram black pastes; Get this slurry 4 grams, add deionized water 10 grams, add caustic soda 0.2 gram, pH value is transferred to 8-9, and then add 1 gram borax, stirred 1.5 hours with 1700 rev/mins, make it dissolving with high speed dispersor; Add zinc sulfate 0.004 gram again, Sodium Nitrite 0.35 restrains, Sodium Benzoate 0.4 gram, and ethanol 0.02 gram continues with high speed dispersor with the extremely dissolving of 1700 rev/mins of high speed dispersion.
Obtain polyaniline aqueous sanitas 15.9 grams.Its outward appearance is the black aqueous solution, free from extraneous odour, and density is (20 ℃) kg/m
3: 1050-1080, pH value are 9-10.
1 kilogram of polyaniline aqueous sanitas, 55 kg ethylene glycol, 44 kilograms of distilled water are mixed in the material barrel, stirred 20 minutes with the high speed dispersion stirrer, filtration can obtain the double centner black liquor, free from extraneous odour, density (20 ℃): kg/m:1080.
Embodiment 2
The preparation of anticorrosive polyaniline agent is with embodiment 1.
2 kilograms of polyaniline aqueous sanitass, 36 kg ethylene glycol, 62 kilograms of distilled water are mixed in the material barrel, stirred 20 minutes with the high speed dispersion stirrer, filtration can obtain the double centner black liquor.
Embodiment 3
The preparation of anticorrosive polyaniline agent is with embodiment 1.
3 kilograms of polyaniline aqueous sanitass, 48 kg ethylene glycol, 49 kilograms of distilled water are mixed in the material barrel, stirred 20 minutes with the high speed dispersion stirrer, filtration can obtain the double centner black liquor.