CN104099599A - Surface treating agent for chrome-based aluminum alloy - Google Patents

Abstract

The invention discloses a surface treating agent for a chrome-based aluminum alloy. The surface treating agent comprises the following raw materials in parts by weight: 0.5-1 part of tea saponin, 0.7-2 parts of ethylene distearamide, 1-2 parts of sodium carboxymethylcellulose, 2.5-4 parts of polylactic acid, 1-2 parts of sodium gluconate, 0.1-0.2 part of chromium trioxide, 0.2-0.4 part of potassium chloride, 0.1-0.4 part of 8-hydroxyquinoline, 0.2-0.4 part of dimethylamino propylamine, 5.6-8 parts of isobutanol, 1-2 parts of coalescing agent, 16-20 parts of silane coupling agent KH570, and 100-140 parts of de-ionized water. The surface treating agent has excellent corrosion resistance, chemicals resistance, heat discoloration resistance and weather resistance, is effective for aluminum alloy workpieces without scratches, and can achieve excellent corrosion resisting effect on exposed scratched parts.

Description

A kind of chromium base aluminum alloy surface treatment agent

Technical field

The present invention relates generally to field of surface treatment, relates in particular to a kind of chromium base aluminum alloy surface treatment agent.

Background technology

The surface treatment method of aluminium alloy has a lot, as Physical, chemical method, physico-chemical processes and synthetic method.Conventional method is anonizing now, by electrochemical method, in aluminum alloy surface, form conversion film, although this method can improve the corrosion resistance nature of aluminium alloy, but the ability that it conforms, transform rete even not, easily come off, wear resisting property does not improve, and although traditional phosphate conversion and chromating process for treating surface can obtain good effect, but contain zinc in the waste liquid of discharging in treating processes, manganese, nickel, the carcinogenic substances such as the heavy metal ion such as chromium and nitrite, environmental pollution is very serious, and metallic surface silanization treatment technology is due to the material of hurm involved environment not, energy consumption in production process is low, technical applications is extensive, be considered to be expected to replace phosphate conversion processing and chromating processing, that recent development direction is protected separately in metallic surface.

Summary of the invention

The object of the invention is just to provide a kind of chromium base aluminum alloy surface treatment agent.

The present invention is achieved by the following technical solutions:

A chromium base aluminum alloy surface treatment agent, it is comprised of the raw material of following weight parts:

Tea saponin 0.5-1, ethylene bis stearamide 0.7-2, Xylo-Mucine 1-2, poly(lactic acid) 2.5-4, Sunmorl N 60S 1-2, chromium trioxide 0.1-0.2, Repone K 0.2-0.4, oxine 0.1-0.4, dimethylaminopropylamine 0.2-0.4, isopropylcarbinol 5.6-8, film coalescence aid 1-2, silane coupling agent KH570 16-20, deionized water 100-140;

Described film coalescence aid is comprised of the raw material of following weight parts:

Organosilicon crylic acid latex 30-40, flaxseed gum 2-3, polyhexamethylene guanidine 0.3-0.5, glycerin polyoxyethylene ether cocounut oil acid esters 0.5-1, ammonium meta-vanadate 0.1-0.2, potassium wolframate 0.1-0.2, Oleum Hippophae 0.4-1, deionized water 60-80;

Potassium wolframate is mixed with ammonium meta-vanadate, join in 10-20 deionized water doubly, at 70-80 ℃, stirring heating 4-10 minute, adds flaxseed gum, is stirred to normal temperature, obtains gel;

Polyhexamethylene guanidine is joined in organosilicon crylic acid latex, after stirring, add above-mentioned gel, drip Oleum Hippophae, after dropwising, be incubated standing 3-5 minute at 50-60 ℃, add each raw material of residue, 200-300 rev/min of dispersed with stirring 20-30 minute, obtains described film coalescence aid.

A preparation method for chromium base aluminum alloy surface treatment agent, comprises the following steps:

Xylo-Mucine is mixed with chromium trioxide, add the 10-20% of above-mentioned deionized water weight, after stirring, add dimethylaminopropylamine, 40-60 rev/min of dispersed with stirring 5-7 minute;

Repone K is mixed with oxine, add poly(lactic acid), be uniformly mixed;

Each raw material after above-mentioned processing is mixed with each raw material of residue, and 150-200 rev/min of dispersed with stirring 1-2 hour, obtains described chromium base aluminum alloy surface treatment agent.

Advantage of the present invention is:

Surface treatment agent of the present invention has and has good erosion resistance, chemical-resistant, heat-resisting discolouration, weathering resistance, not only effective for not producing abrasive Al alloy parts, for the scuffing portion of exposing, also can play good anticorrosion effect.

Embodiment

Embodiment 1

A chromium base aluminum alloy surface treatment agent, it is comprised of the raw material of following weight parts:

Tea saponin 0.5, ethylene bis stearamide 0.7, Xylo-Mucine 2, poly(lactic acid) 2.5, Sunmorl N 60S 1, chromium trioxide 0.2, Repone K 0.4, oxine 0.4, dimethylaminopropylamine 0.4, isopropylcarbinol 5.6, film coalescence aid 1, silane coupling agent KH570 20, deionized water 140;

Described film coalescence aid is comprised of the raw material of following weight parts:

Organosilicon crylic acid latex 40, flaxseed gum 3, polyhexamethylene guanidine 0.5, glycerin polyoxyethylene ether cocounut oil acid esters 0.5, ammonium meta-vanadate 0.2, potassium wolframate 0.2, Oleum Hippophae 0.4, deionized water 80;

Potassium wolframate is mixed with ammonium meta-vanadate, join in the deionized water of 20 times, at 80 ℃, stirring heating is 4 minutes, adds flaxseed gum, is stirred to normal temperature, obtains gel;

Polyhexamethylene guanidine is joined in organosilicon crylic acid latex, add above-mentioned gel after stirring, drip Oleum Hippophae, after dropwising, be incubated standing 3 minutes at 60 ℃, add each raw material of residue, 300 revs/min of dispersed with stirring 30 minutes, obtain described film coalescence aid.

A preparation method for chromium base aluminum alloy surface treatment agent, comprises the following steps:

Xylo-Mucine is mixed with chromium trioxide, add 20% of above-mentioned deionized water weight, after stirring, add dimethylaminopropylamine, 60 revs/min of dispersed with stirring 7 minutes;

Repone K is mixed with oxine, add poly(lactic acid), be uniformly mixed;

Each raw material after above-mentioned processing is mixed with each raw material of residue, and 200 revs/min of dispersed with stirring 2 hours, obtain described chromium base aluminum alloy surface treatment agent.

Using method:

The Al alloy parts carrying out after degreasing, washing is placed in to surface treatment agent of the present invention and floods, working temperature 20-40 ℃, working hour 0.5-1min.

Performance test:

Getting the aluminum alloy plate materials of surface treatment agent processing of the present invention tests, the specification of this sheet material is 80mm * 100mm * 4mm, by this sheet material lateral dissection, carry out spray test, agents useful for same is that concentration is 5% sodium chloride solution, test period 300 hours, measures the bubbling width forming in line of cut one side, and result bubbling width is 0;

Salt tolerance:

It is in 5% sodium chloride solution that this sheet material is immersed in to concentration, soaks 300 hours, and material surface is substantially unchanged, soaks 300 hours, without rust staining, occurs;

Acid resistance:

This sheet material is sprayed to experiment with the 0.05mol/l sulfuric acid that temperature is 23 ℃, and experimental period 20 hours, cleans with clear water, and indoor placement 2 hours, coating surface was unchanged, and nothing is bubbled, nothing comes off, nothing is damaged;

Stripper-resistance:

The paste that this plate surface is coated with to last layer 2-3mm, being put into temperature is 50 ℃, and in the watertight chest that relative humidity is 90-96%, experimental period 24 hours, cleans with clear water after taking-up, and coating surface is without bubbling, without coming off, without damaged.

Claims (2)

1. a chromium base aluminum alloy surface treatment agent, is characterized in that what it was comprised of the raw material of following weight parts:

Tea saponin 0.5-1, ethylene bis stearamide 0.7-2, Xylo-Mucine 1-2, poly(lactic acid) 2.5-4, Sunmorl N 60S 1-2, chromium trioxide 0.1-0.2, Repone K 0.2-0.4, oxine 0.1-0.4, dimethylaminopropylamine 0.2-0.4, isopropylcarbinol 5.6-8, film coalescence aid 1-2, silane coupling agent KH570 16-20, deionized water 100-140;

Described film coalescence aid is comprised of the raw material of following weight parts:

Organosilicon crylic acid latex 30-40, flaxseed gum 2-3, polyhexamethylene guanidine 0.3-0.5, glycerin polyoxyethylene ether cocounut oil acid esters 0.5-1, ammonium meta-vanadate 0.1-0.2, potassium wolframate 0.1-0.2, Oleum Hippophae 0.4-1, deionized water 60-80;

Potassium wolframate is mixed with ammonium meta-vanadate, join in 10-20 deionized water doubly, at 70-80 ℃, stirring heating 4-10 minute, adds flaxseed gum, is stirred to normal temperature, obtains gel;

Polyhexamethylene guanidine is joined in organosilicon crylic acid latex, after stirring, add above-mentioned gel, drip Oleum Hippophae, after dropwising, be incubated standing 3-5 minute at 50-60 ℃, add each raw material of residue, 200-300 rev/min of dispersed with stirring 20-30 minute, obtains described film coalescence aid.

2. a preparation method for chromium base aluminum alloy surface treatment agent as claimed in claim 1, is characterized in that comprising the following steps:

Xylo-Mucine is mixed with chromium trioxide, add the 10-20% of above-mentioned deionized water weight, after stirring, add dimethylaminopropylamine, 40-60 rev/min of dispersed with stirring 5-7 minute;

Repone K is mixed with oxine, add poly(lactic acid), be uniformly mixed;

Each raw material after above-mentioned processing is mixed with each raw material of residue, and 150-200 rev/min of dispersed with stirring 1-2 hour, obtains described chromium base aluminum alloy surface treatment agent.