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Q Why does the aluminum sheet surface become dark, speckled, or uneven in color after installation?
A This is often caused by environmental corrosion or defects in the surface treatment process. It is recommended to use anodizing/fluorocarbon spraying to enhance weather resistance. Clean regularly with a neutral detergent and avoid contact with strong acids and alkalis. Discoloration can be repaired with a professional cleaning agent; severe damage requires return to the factory for treatment.
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Q Why do cracks or leaks occur at the welded parts of aluminum tubes?
A This is due to improper welding parameters, mismatched welding materials, or stress concentration. We recommend TIG/MIG welding with dedicated aluminum welding wire. Clean the surface and control heat input before welding. Perform X-ray/ultrasonic testing after welding. Regularly inspect the weld condition for long-term use.
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Q Why does insufficient thickness in certain areas of aluminum sheeting affect its load-bearing or compressive performance?
A Uneven thickness is often caused by defects in the rolling process or raw material problems. It is recommended to use an ultrasonic thickness gauge to check the overall sheet thickness to ensure a tolerance of ≤±0.02mm. Key areas may require localized thickening or reinforcement. Installed sheet metal requires structural reinforcement or replacement with qualified sheet metal.
