Highly-corrosion-resistant water-based anticorrosive paint for hydrophilic coated aluminum foil, application and using method

Abstract

The invention discloses a highly-corrosion-resistant water-based anticorrosive paint for a hydrophilic coated aluminum foil, which comprises the following components in percentage by weight: 35 to 55 percent of polyacrylic emulsion, 5 to 15 percent of amine resin, 0.1 to 1.0 percent of flatting agent, 0.1 to 1.0 percent of foam suppressor, 0.1 to 1.0 percent of antifreeze, 5 to 14 percent of coalescent, 1 to 4 percent of water-based epoxy resin and 20 to 40 percent of de-ionized water. A method for preparing the paint comprises the following steps: 1) preparing the polyacrylic emulsion; 2) preparing the water-based epoxy resin; and 3) adding the polyacrylic emulsion prepared in the step 1), the water-based epoxy resin prepared in the step 2) and the other components in proportion into a high-speed dispersing machine for stirring and dispersing. The method for using the paint comprises the step of: coating the prepared highly-corrosion-resistant water-based anticorrosive paint onto the front and back of the aluminum foil by adopting a roller coat process, wherein the coating is performed under the conditions that the curing temperature is 20 to 250 DEG C and curing time is 15 to 40 seconds. The highly-corrosion-resistant water-based anticorrosive paint improves the corrosion resistance of the hydrophilic coated aluminum foil and meets the use requirement of an air conditioner with high corrosion resistant requirement.

Description

technical field [0001] The invention relates to a high-corrosion-resistant water-based anti-corrosion coating, in particular to a high-corrosion-resistant water-based anti-corrosion coating for a hydrophilic coated aluminum foil used on an air conditioner cooling fin. The invention also relates to a method for preparing and using the paint. Background technique [0002] With the development of refrigeration industries such as air-conditioning, in addition to using hydrophilic coated aluminum foil to make fins for air-conditioning heat exchangers, higher requirements for anti-corrosion are also put forward. Heat exchangers are generally assembled into two devices (condenser and evaporator) by fins and metal tubes (usually copper tubes). Coated aluminum foil for air conditioner heat sinks is different for the use of the environment (occasions). The anti-corrosion ability is also different. The dry film amount of the hydrophilic coated aluminum foil anti-corrosion layer is con...

AI Technical Summary

Problems solved by technology

Heat exchangers are generally assembled into two devices (condenser and evaporator) by fins and metal tubes (usually copper tubes). Coated aluminum foil for air conditioner heat sinks is different for the use of the environment (occasions). The anti-corrosion ability is also different. The dry film amount of the hydrophilic coated aluminum foil anti-corrosion layer is controlled at 1.0-1.5g / m 2 , general air conditioners require hydrophilic coated aluminum foil 500 hours neutral salt spray test ≥ 9.5 level, while air conditioners used in large ships, marine climates, coastal areas and high corrosion environments require neutral salt spray test time to reach 1000 hours And more than 1000 hours, ordinary water-based anti-corrosion coatings cannot meet the above requirements