Process method capable of removing isocyanate-type flexible anticorrosion composite coating for power generator

A technology for removing isocyanate and composite coatings, which is applied in the technical field of isocyanate-removable flexible anti-corrosion composite coatings for generators. It can solve problems such as limited anti-corrosion performance, failure to meet anti-corrosion requirements, and limited application range. Excellent performance, adjustable curing time, sufficient wetting effect

Inactive Publication Date: 2019-12-31

HARBIN ELECTRIC MASCH CO LTD

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Problems solved by technology

However, due to its limited anti-corrosion performance, it cannot meet the anti-corrosion requirements of high salt spray and high te...

Abstract

The invention discloses a process method capable of removing an isocyanate-type flexible anticorrosion composite coating for a power generator. According to the process method, under the condition ofnot using a cleaning solvent, the whole composite coating can be conveniently and quickly removed and has ultraviolet-aging-resistant performance and high water-tolerant performance, and the salt mistcorrosion resistance capacity of the composite coating is more than two times that of a traditional sealing anti-rust material. The process method is easy and convenient to operate, easy to control and wide in application prospect and has an obvious effect. The problem is solved that the finishing surface of a power generator component is rusted frequently under the high-salt-mist, high-temperature and high-humidity exposed environment. The social and economic benefits are obvious.

Application Domain

Anti-corrosive paintsSpecial surfaces

Technology Topic

IsocyanateEngineering +5

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Examples

Experimental program(1)

Example Embodiment

[0018] Such as figure 1 As shown, the generator uses the process method for removing the isocyanate-type flexible anticorrosive composite coating. The composite coating is made of a single-component polybutadiene elastomer removable coating as the base coating and the isocyanate-type flexible coating The layer is composed of surface coating, and the specific coating process is as follows:

[0019] Step 1: Pretreatment of the metal substrate. Use a white cotton cloth dipped in a cleaning solvent to wipe and clean the finishing surface of the generator component to remove surface grease, stains and impurity particles. Finally, use a white cotton cloth dipped in ethanol to wipe and check the precision. The cleaning effect of the processed surface is to observe whether there are stains on the cotton cloth. If there is any residue, clean it up again.

[0020] Step 2: On the cleaned and finished surface described in step 1), use brushing to carry out the construction operation of the one-component polybutadiene elastomer peelable paint. The dry film thickness of the coating is required to be 30-50 microns. The construction temperature is controlled at 5 to 35 degrees Celsius, and the maximum environmental humidity is less than 80%;

[0021] Step 3: After step 2) is completed, wait for 20-30 minutes for the solvent to evaporate and dry, and then use brushing to perform the second overcoating operation of the one-component polybutadiene elastomer peelable paint, two operations Afterwards, the final dry film thickness of the removable coating is 80-100 microns, the construction temperature is controlled at 5 to 35 degrees Celsius, and the maximum environmental humidity is less than 80%;

[0022] Step 4: After step 3) is completed, wait for 6-8 hours until the solvent in the single-component polybutadiene elastomer can be removed to form a film after the solvent is completely volatilized to form a film, then brush the isocyanate type flexible coating Construction operation, the operation process is: mix the A component isocyanate and the B component secondary amine polymer in a mass ratio of 1:1 and stir them thoroughly. The mixed coating should be used within 40 minutes, and the cross is used. The method of brushing construction requires that the dry film thickness of the first isocyanate-type flexible coating is 100-150 microns, the construction temperature is controlled at 5 to 35 degrees Celsius, and the maximum environmental humidity is less than 80%;

[0023] Step 5: After step 4) is completed, wait for 2 hours, and then perform the second construction operation of the isocyanate type flexible coating according to the requirements of step 4). The dry film thickness of the second construction of the isocyanate type flexible coating is 100-150 Micron, the construction temperature is controlled at 5~35 degrees Celsius, and the maximum humidity of the environment is less than 80%;

[0024] Step 6: After step 5) is completed, wait for 24 hours after the isocyanate-type flexible coating is fully cured, and then load and ship the generator components.

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Classification and recommendation of technical efficacy words

Low VOC emission

Process method capable of removing isocyanate-type flexible anticorrosion composite coating for power generator

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Description & Claims & Application Information

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