Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a non-consumable tungsten electrode to produce the weld.he use of any shielding gas containing an oxygen compound, such as carbon dioxide, quickly contaminates the tungsten electrode, making it unsuitable for the TIG process. In 1953, a new process based on GTAW was developed, called plasma arc welding.
Another cause of ridges on fingernails is lack of moisture. If your nails are ridged or cracked, massaging the nails or cuticles with a moisturizing cream or oil can be very beneficial, as can increasing the amount of water you drink.
Causes and symptoms of ridges in fingernails Fingernails are made by living skin cells in your fingers. So a skin condition such as eczema may lead to fingernail ridges. Skin dryness can also cause these ridges. If your body is low in protein, calcium, zinc, or vitamin A, a deficiency can sometimes be revealed by ridges in your fingernails. Vertical ridges. Vertical ridges are furrows that run from the tip of your fingernail down to the cuticle.