Discussion on "Pressure welding light alloys" at the London Section of the Institution

In reply to a question as to the minimum thickness of normal commercial purity aluminium that could be pressure welded, MR. TYLEGOTE said that articles had been pressure welded down to about 0-005 m-¿toothpaste tubes and so on. He would say that the minimum thickness was very small indeed, of the order of 0-001 in. or 0-002 in. Mr. HILL asked how oxidation was eliminated. Presumably raising the temperature to 45O°C. would cause a certain amount. Would any flux be used ?