Exposure of a True Metal Surface?

Discussion in 'Chemistry' started by Facial, Oct 10, 2010.

  1. Walter L. Wagner Cosmic Truth Seeker Valued Senior Member

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    2,543
    I believe welding in a Nitrogen atmosphere (with oxyacetylene for the heat, not requiring ambient oxygen for flame) is the preferred method?
     
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  3. Billy T Use Sugar Cane Alcohol car Fuel Valued Senior Member

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    Yes, provided the flame is slightly oxygen poor - I.e. a reducing flame. You can see a pure metal spot, as I have, form on the surface of oxidized copper under the flame. Only way you will see that copper surface is pinkish.
     
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