Monday, 7 April 2014

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Hydrogen Embrittlement in Welding Joint

                   


Hydrogen embrittlement is common defect in welding. It is popular in the welding of titanium, Steel & Aluminium. At high temperature, hydrogen dissolves into to the molten metal. It also reacts with metal. At lower temperature hydrogen atoms starts combining. Thus causes a pressure inside the lattice. Due to this embrittlement, strength of the material s reduced greatly.
The exact mechanism of hydrogen embrittlement is still unknown.

In welding, due to hydrogen embrittlement we avoid moisture. Due to hydrolysis, hydrogen is produced. Flux coating can absorb moisture.

1 comment:

  1. this is more popular defect in welding and foundry.

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