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.
It is important to understand the difference between longitudinal ridges in the nails and other abnormalities of the nails. As stated, longitudinal ridges extend from the cuticle to the top of the nail. If you see horizontal striping on the nails, then you may have cause for concern. White lines and horizontal ridges could indicate signs of arsenic poisoning.