Q1: How to check aluminum alloy authenticity?
Handheld XRF guns verify composition in 10 seconds. Confirm mill certificates include EN 10204 3.1 stamp. Compare against standard alloy properties. Original packaging shows manufacturer details. Trace ID numbers should match documentation.
Q2: What causes visible streaks on anodized surfaces?
Uneven pretreatment cleaning. Inconsistent voltage during anodizing. Temperature fluctuations in electrolyte baths. Contaminated dye baths. Poor rinsing after coloring.
Q3: How to spot low-quality aluminum profiles?
Visible die lines along extrusion length. Uneven wall thicknesses. Surface dents from improper handling. Grainy instead of smooth finishes. Packaging without anti-scratch film.
Q4: Why measure aluminum thickness precisely?
Thinner materials risk denting in construction. Overspec thickness wastes money. Automotive parts require exact tolerances. Affects anodizing/painting adhesion. Impacts weight calculations for shipping.
Q5: How to test corrosion resistance?
Salt spray tests expose samples to mist (per ISO 9227). Measure rust spots after 500/1000 hours. Check for coating blisters or peeling. Scribe tests evaluate rust creepage. Outdoor exposure racks provide real-world data.
