Many customers who do not engage in the manufacturing of mechanical processed products are curious about how the surface color of the racks is treated?
Our shelf products primarily utilize epoxy powder electrostatic spraying for surface treatment. Below, we'll delve into this process one by one.
Powder静电Spray Coating Requirements
1Spray Coating Technique
The surface of the shelf components should ideally be coated with powder electrostatic spraying technology. When using other coating processes for the shelf components, it is advisable to comply with JB/T 5000.12 The provisions.
2Spray Paint Materials
Thermosetting powder coatings should meetHG/T 2006The requirements include hardness, adhesion, impact resistance, bending tests, as well as resistance to alkalinity and acidity, etc.GB/T 9278Tests were conducted under specified temperature conditions.
3Environmental Requirements for Painting
The environmental temperature and relative humidity during painting should comply with the requirements specified in the paint product manual; when no requirements are stated in the manual, the indoor temperaturePlease provide the Chinese content to be translated.538 °CBetween periods, the relative humidity should not exceed85%When condensation appears on the component surface, painting should not be conducted.
4Pre-treatment for Coating
①Prior to powder electrostatic spraying, surface oils, rust, dust, and other impurities should be removed, ensuring no residue from pretreatment solutions (or cleaning agents) or any other contaminants that could affect coating quality remains.
②Pre-treatment phosphatization quality inspection before part coating should be conducted as follows:GB/T 6807Compliance with regulations, including inspections of the appearance, weight, corrosion resistance of the phosphating film, and corrosion resistance of the coating film.
③After surface treatment, it should be24 hCompleted powder coating operations domestically.
5Coating Requirements
①Coating colors should meet the requirements of the customer-confirmed samples, color charts, or order specifications. The coating colors should match the color chart under natural light.0.5 mVisually comparing, there should be no noticeable color difference.
②The average coating thickness should not be less than60μm,Please provide the Chinese content to be translated.40μm。
③Coating hardness should not be less thanGB/T 6739No Chinese content provided.HThe level of hardness.
④Resistance to delamination of coating from the substrate should be achievedGB/T 9286-1998The classification table specified in the test results grading standard0Level up.
⑤The moisture and heat resistance of the coating should be achieved.GB/T 1740-2007No Chinese content provided.1No Chinese content provided.
6Quality Assessment of Coated Surfaces
①One of the following conditions applies to the coating of the shelf components:
aSlight orange peel texture.
bMinor pinholes, shrinkage.
cMinimal color variation.
②If the coating of the shelf components falls under any of the following conditions, it is deemed不合格:
aSevere orange peel texture.
bVisible pinholes, shrinkage holes.
cSignificant color variation.
dSignificant surface exposure or scratches visible.
eBubble;
fPartial detachment observed.
