Wiring and componentsQuestion 455 of 1506

Why can aluminum not be tinned and soldered with ordinary solder?

It melts below the solder temperature
Its surface oxidizes almost at once, so a clean surface cannot be kept
It is too good a conductor
It does not conduct heat

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Correct answer: Its surface oxidizes almost at once, so a clean surface cannot be kept

Oxides stop the solder wetting.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 10.1: Solder Bonding

Questions last reviewed: 18 October 2026

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