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What is an oxidizing or a carburizing flame?

April 26, 2017carburizing flame oxidizing

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What is an oxidizing or a carburizing flame?

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(top) An oxidizing flame is produced when excess oxygen is supplied to the flame. A carburizing flame results from an excess of fuel gas in the flame. Each different fuel gas requires a different amount of oxygen to burn completely. In the case of acetylene, when one volume of oxygen is mixed with one volume of acetylene a neutral flame with a well defined inner cone (primary flame) is produced. If more acetylene is added it produces a carburizing flame with an inner cone that has a visible acetylene feather and an orange coloured outer envelope (secondary flame).