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.
Nails grow around 1 milllimeter every six to 10 days, so ridges can indicate when a deficiency began. Beau's lines, a specific type of ridge, run horizontally across the fingernail, forming palpable ridges. The color of the nail can vary on either side of the ridge. Usually all your nails have a ridge in the same place.