Main inspection items of coating powder film

The main inspection items for powder coating operation include coating color, appearance, thickness, gloss, adhesion, flexibility, bending test, impact resistance, cupping test, scratch test, pencil hardness, abrasion resistance, Chemical media, heat and humidity resistance, neutral salt spray resistance, aging (artificial acceleration) and weather resistance evaluation and other items. The inspection methods for these items are shared with the coating inspection methods for ordinary materials. In addition, for special powder coating varieties or powder coating products with special requirements, it also includes cathodic disbondment test, coating porosity, scratch hardness, cut-through resistance, bending cracking resistance, dielectric constant, volume resistance, Test items such as withstand voltage, tensile strength, elongation, heat resistance, solvent vapor resistance, corner coverage, etc.

In GB6554-86 "Powder Coating Test Method for Electrical Absolute Image Method", it includes appearance inspection, thickness measurement, layer porosity, notch scale, cut-through resistance, impact strength, cupping test (recommended instrument : cupping Tester) , bending cracking, electric strength, dielectric loss tangent and relative permittivity, volume resistance car after immersion in water, temperature resistance electric tracking test, chemical resistance, solvent resistance, gas resistance, heat resistance, Inspection methods for items such as corner coverage rate.

In the oil and gas industry standard SY/T0315-97 "Technical Standard for Secondary Epoxy Powder Coating of Steel Pipelines", it includes the curing time test of the oxygen powder method, the thermal characteristic test of the oxygen powder and its method layer , coating peeling resistance test, chemical corrosion sensitivity test for decoating, porosity measurement for decommissioning, anti-bending performance test for coating, anti-shock performance test for coating, stress resistance of coating Test method for determination of items such as date.

In the petroleum and natural gas industry standard SY/T0442-97 "Technical Standards for Steel Pipeline Fusion Ring Gas Powder Removal Layer", it includes the coating impact strength test method, coating adhesion test method (instrument: adhesion Tester), Inspection methods for coating bending resistance test methods and other items.