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.
The vertical ridges are the ridges on the nails which run in the same direction as the long axis of the finger and are the most common types of the nail ridges. Trauma, aging and certain underlying medical or health conditions are some of the causes for the appearance of such vertical ridges on the nails.