CN104099009A - Urea-containing aluminum alloy surface treatment agent - Google Patents

Abstract

The invention discloses a urea-containing aluminum alloy surface treatment agent. The urea-containing aluminum alloy surface treatment agent is prepared from the following raw materials in parts by weight: 1.2-2 parts of bottle gourd pakistan rubber, 1.3-2 parts of tetramethylammonium nitrate, 2.5-4 parts of urea, 2-3 parts of chlorinated paraffin, 0.2-0.3 part of manganese oxide, 0.6-1 part of microsilica, 0.3-1 part of disodium hydrogen phosphate, 0.4-1 part of potassium acid tartrate, 0.1-0.2 part of adipic acid propylene glycol polyester, 0.1-0.4 part of lithium carbonate, 2.5-3 parts of octadecanoic acid, 2-4 parts of a film forming aid, 16-20 parts of a silane coupling agent KH560 and 110-135 parts of deionized water. According to the urea-containing aluminum alloy surface treatment agent, the added urea substitutes for the conventional chromate and nitrate, an excellent buffer effect is obtained, the processing method is simple, fewer dregs are generated, and a formed coating is compact in tissue and good in adhesive property.

Description

A kind of urea-containing aluminum alloy surface treatment agent

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Technical field

The present invention relates generally to field of surface treatment, relates in particular to a kind of urea-containing 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, form conversion film by electrochemical method in aluminum alloy surface, 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 heavy metal ion and nitrite such as chromium, 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, being considered to be expected to replace phosphate conversion processes 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 urea-containing aluminum alloy surface treatment agent.

The present invention is achieved by the following technical solutions:

A kind of urea-containing aluminum alloy surface treatment agent, it is made up of the raw material of following weight parts:

Trigonella bean gum 1.2-2, tetramethyl-ammonium nitrate 1.3-2, urea 2.5-4, clorafin 2-3, manganese oxide 0.2-0.3, SILICA FUME 0.6-1, Sodium phosphate dibasic 0.3-1, tartarus 0.4-1, hexanodioic acid propanediol polyester 0.1-0.2, Quilonum Retard 0.1-0.4, stearic acid 2.5-3, film coalescence aid 2-4, silane coupling agent KH560 16-20, deionized water 110-135;

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

Protanal Ester SD-LB 20-30, urea 2-3, Sodium Citrate 1-2, octyl group isothiazolinone 0.8-1, clorafin 52 2-3, Span-80 0.5-1, benzyltriethylammoinium chloride 1-2, deionized water 100-120;

Octyl group isothiazolinone is joined in clorafin 52, at 50-60 DEG C, be uniformly mixed 3-4 minute, add 20-30%, the Span-80 of above-mentioned deionized water weight, 100-200 rev/min of dispersed with stirring 6-10 minute;

Urea is mixed with Sodium Citrate, add the 20-30% of above-mentioned deionized water weight, at 25-30 DEG C, be uniformly mixed 3-5 minute, add benzyltriethylammoinium chloride, 100-200 rev/min of dispersed with stirring 5-10 minute;

Protanal Ester SD-LB is joined in remaining deionized water, add above-mentioned each raw material after treatment, 200-300 rev/min of dispersed with stirring 10-20 minute, obtains described film coalescence aid.

A preparation method for urea-containing aluminum alloy surface treatment agent, comprises the following steps:

Manganese oxide, SILICA FUME are mixed, after ball milling is even, add urea, be heated to 70-80 DEG C, add stearic acid, insulated and stirred 4-6 minute;

Clorafin, Quilonum Retard are mixed, after stirring, add tetramethyl-ammonium nitrate, be uniformly mixed 4-7 minute at 60-70 DEG C, be cooled to normal temperature;

Trigonella bean gum is joined in deionized water, add above-mentioned each raw material after treatment and the each raw material of residue after stirring, 200-300 rev/min of dispersed with stirring 1-2 hour, obtains described urea-containing aluminum alloy surface treatment agent.。

Advantage of the present invention is:

The urea adding in surface treatment agent of the present invention replaces traditional chromic salt, nitrate, plays good slow release effect, and treatment process is simple, and the sediment of generation is few, the film dense structure of formation, and tack is good.

Embodiment

Embodiment 1

A kind of urea-containing aluminum alloy surface treatment agent, it is made up of the raw material of following weight parts:

Trigonella bean gum 1.2, tetramethyl-ammonium nitrate 1.3, urea 2.5, clorafin 3, manganese oxide 0.3, SILICA FUME 0.6, Sodium phosphate dibasic 0.3, tartarus 0.4, hexanodioic acid propanediol polyester 0.2, Quilonum Retard 0.4, stearic acid 2.5, film coalescence aid 2, silane coupling agent KH560 20, deionized water 135;

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

Protanal Ester SD-LB 30, urea 3, Sodium Citrate 1, octyl group isothiazolinone 0.8, clorafin 52 3, Span-80 0.5, benzyltriethylammoinium chloride 1, deionized water 120;

Octyl group isothiazolinone is joined in clorafin 52, at 60 DEG C, is uniformly mixed 4 minutes, add above-mentioned deionized water weight 30%, Span-80,200 revs/min of dispersed with stirring 10 minutes;

Urea is mixed with Sodium Citrate, add 20% of above-mentioned deionized water weight, at 30 DEG C, be uniformly mixed 3 minutes, add benzyltriethylammoinium chloride, 200 revs/min of dispersed with stirring 10 minutes;

Protanal Ester SD-LB is joined in remaining deionized water, add above-mentioned each raw material after treatment, 300 revs/min of dispersed with stirring 20 minutes, obtain described film coalescence aid.

A preparation method for urea-containing aluminum alloy surface treatment agent, comprises the following steps:

Manganese oxide, SILICA FUME are mixed, after ball milling is even, add urea, be heated to 80 DEG C, add stearic acid, insulated and stirred 4-6 minute;

Clorafin, Quilonum Retard are mixed, after stirring, add tetramethyl-ammonium nitrate, be uniformly mixed 4-7 minute at 70 DEG C, be cooled to normal temperature;

Trigonella bean gum is joined in deionized water, add above-mentioned each raw material after treatment and the each raw material of residue after stirring, 200 revs/min of dispersed with stirring 2 hours, obtain described urea-containing 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 DEG C, 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, occurs without rust staining;

Acid resistance:

This sheet material is sprayed to experiment with the 0.05mol/l sulfuric acid that temperature is 23 DEG C, 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 DEG C, 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 urea-containing aluminum alloy surface treatment agent, is characterized in that what it was made up of the raw material of following weight parts:

Trigonella bean gum 1.2-2, tetramethyl-ammonium nitrate 1.3-2, urea 2.5-4, clorafin 2-3, manganese oxide 0.2-0.3, SILICA FUME 0.6-1, Sodium phosphate dibasic 0.3-1, tartarus 0.4-1, hexanodioic acid propanediol polyester 0.1-0.2, Quilonum Retard 0.1-0.4, stearic acid 2.5-3, film coalescence aid 2-4, silane coupling agent KH560 16-20, deionized water 110-135;

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

Protanal Ester SD-LB 20-30, urea 2-3, Sodium Citrate 1-2, octyl group isothiazolinone 0.8-1, clorafin 52 2-3, Span-80 0.5-1, benzyltriethylammoinium chloride 1-2, deionized water 100-120;

Octyl group isothiazolinone is joined in clorafin 52, at 50-60 DEG C, be uniformly mixed 3-4 minute, add 20-30%, the Span-80 of above-mentioned deionized water weight, 100-200 rev/min of dispersed with stirring 6-10 minute;

Urea is mixed with Sodium Citrate, add the 20-30% of above-mentioned deionized water weight, at 25-30 DEG C, be uniformly mixed 3-5 minute, add benzyltriethylammoinium chloride, 100-200 rev/min of dispersed with stirring 5-10 minute;

Protanal Ester SD-LB is joined in remaining deionized water, add above-mentioned each raw material after treatment, 200-300 rev/min of dispersed with stirring 10-20 minute, obtains described film coalescence aid.

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

Manganese oxide, SILICA FUME are mixed, after ball milling is even, add urea, be heated to 70-80 DEG C, add stearic acid, insulated and stirred 4-6 minute;

Clorafin, Quilonum Retard are mixed, after stirring, add tetramethyl-ammonium nitrate, be uniformly mixed 4-7 minute at 60-70 DEG C, be cooled to normal temperature;

Trigonella bean gum is joined in deionized water, add above-mentioned each raw material after treatment and the each raw material of residue after stirring, 200-300 rev/min of dispersed with stirring 1-2 hour, obtains described urea-containing aluminum alloy surface treatment agent.