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.
Malnutrition and Malabsorption Can Cause Ridges on Nail or Vertical Lines on Nails: Lack of proper intake of food leading to a deficiency in diet and nutrients like vitamins and minerals is known as malnutrition. While the lack of proper absorption of nutrients in to the body is known as malabsorption.