I-CAR AWQT Practice Questions - I-CAR Aluminum Welding Qualification Test (AWQT) Exam

Why is a stainless-steel brush (not a carbon-steel brush) used to remove aluminum oxide immediately before welding?

Stainless steel brushes are softer than the aluminum Carbon-steel bristles contaminate the aluminum with iron and create corrosion sites Stainless steel brushes generate static electricity to attract oxide particles Carbon-steel bristles are too soft to remove the oxide layer

Correct Answer:

Carbon-steel bristles contaminate the aluminum with iron and create corrosion sites

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