How does the metal logo detect if the paint is falling off?-B
Forth. Metal logo paint falling off environmental simulation test Temperature cycle test Conditions: -40°C to 85°C, 2 hours per cycle, 10 cycles. Criteria: No cracking or peeling of paint layer. Damp Heat Test Conditions: 85°C, 85% RH for 168 hours. Standard: no blistering or discolouration of the paint layer, and the adhesion meets the requirements. Fifth. special scenario test Metal logo paint falling off ultraviolet aging test Tool: QUV accelerated aging tester (UVA-340 lamp). Conditions: Irradiance 0.76W/m², 60°C, 8 hours of light + 4 hours of condensation, cycle 300 hours. Criteria: No chalking or fading of the paint layer, colour difference ΔE ≤ 3. Paint falling off mechanical impact test Tool: Drop hammer impact tester. Steps: Free fall impact from 50cm height, observe whether the paint layer is peeling off. Standard: no peeling of paint layer in the impact area, adhesion meets the requirements. Sixth. Paint falling off comprehensive judgement and report Judgement basis Combine all test results and grade according to ISO 2409 (adhesion), ASTM B117 (salt spray), MIL-STD-810G (environment) and other standards. Metal logo paint falling off Report content including test methods, data, pictures and conclusions (such as ‘qualified’ or ‘need to improve the area’). Seventh.improvement measures If the paint falling off Optimise the pre-treatment process (e.g. add sand blasting), adjust the thickness of the paint layer or replace the paint with more weather-resistant paint (e.g. polyurethane, fluorocarbon paint). Preventive measures Introduce on-line inspection equipment (e.g. laser confocal microscope) in production to monitor the quality of the paint layer in real time.
