Application process
Requirement on pre-treatment
①. Firstly, degreasing at high-temperature, then wash with 1%~3% NaOH solution (60℃) for more than 6 minutes, dry it after water rinsing;
②. Blast with 80#~120# corundum to make the surface roughness reach 2.0 μ ~3.0μ, pay attention to sandblast evenly;
③. Wash with 1%~3% NaOH solution(60℃) for more than 6 minutes, rinse with water;
④. Wash with 1%~3% hydrochloric acid solution (60℃) for more than 6 minutes, rinse with water and dry.
Preparation of the coating
①. Dispersion of coating: the primer mid coating and top coating must be fully dispersed before operation. Rolling the coating at the speed of 30rpm with rolling machine for 30min. Checking the bottom of bucket without precipitate, agglomeration. Be careful not to exceed 60min;
②. Coating filtration: filtrate the coating with screen (100mesh) before using.(Except the topcoat)
Application
The spraying environment should be dry, well-ventilated, without dirt, recommend using dedicated spray gun, elevated tank and curing oven;
The air compressor should be degreased, dewatered and equipped with water oil separator before using;
Adjust atomization and oil pump capacity of the spraying gun; make sure the unit is clean and flat;
Make the pretreated substrates clean before spraying;The pan spraying primer, primer coat could be sprayed with normal spray gun; after primer, top coat should be uniform, then increase the temperature to 280℃ gradually and keep for 8min ~10min; control the dry film thickness of the primer and top coat in the range of 35μm~45μm.
The oven (or the tunnel drier) must be well ventilated, with good conditions to meet requirements of temperature: about 10 minutes for temperature increasing, enough curing time; otherwise, it will lead to color change of coating.
Storage
The coating should be stored at the temperature between 5℃-10℃, with the shelf life for 6 months , Freezing is prohibited in winter. Transportation or storage at the temperature above 40℃ is forbidden;
The storage place should be well-ventilated and dry. Keep it away from direct sun exposure, the source of ignition and heat.
