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Corrosion of Stainless Steel
A. Effect of MIG on the corrosion of stainless steel
The welding process plays a significant in the control of heat and cooling by itself and
thereby controls distortion and corrosion. Traditionally, Tungsten Inert Gas (TIG), an example of
the metal inert gas welding (MIG), was used in the welding of stainless steel, and it is still the
optimal method for extremely high purity applications on pipes or tubes (Węgrzyn et al. 18).
Importantly, TIG welding process prevents corrosion by its ability to fuse the tube or the
pipe without the addition of fillers metal assisting in making the heat down and eliminate any
chemical change that could have been created by the addition of the filler metal. However, this
method is only applicable for metals that are less than an eighth in thickness since as the tube
increases its thickness; it becomes necessary to add filler and bevel the pipe (Węgrzyn et al. 7).
There are some pipes of smaller diameter having thicker walls, and TIG has always been
the optimal process for welding such tubes since it is not practical to switch to a wiring process
on the small diameter (Węgrzyn et al. 9). The TIG welding process has made it possible for this
application because its pulsating capability has helped keep the heat down and improve the
sustainability. The older TIG was limited to the pulsing of up to 20 pulses per second, but the
new TIG have high pulsing of up to 500 pulses per second, and the high speed has been critical
in preventing corrosion
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Importantly, the ability to control the pulsing has significantly allowed the welder to
reduce heat input, therefore, regulating penetration and minimizing distortion. Furthermore,
higher pulsing has improved the fusing rate thus minimizes the use of filler metals. Therefore,
TIG decreases corrosion by reducing the amount of filler metal and enhances the heat down thus
decreasing any chemical changes that that could increase corrosion (Węgrzyn et al. 18).
However, there are thicker high...
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