First of all, if your welding on a gas tank while it still in the car I would think that the undercoating is going to be the LEAST of your worries. I dont know who told you that you could weld that up but they have lost their minds. Dont do that without taking the gas tank out and filling it full of water before you even start. I hope your still alive. Ray You're joking, right? This is not believable. I hope you didn't post this in hopes some other idiot would try it? Step away from the car, give the keys to a responsible adult.
under cut , porosity , slag , cracks , misalignment , burn-throw
Many problems can be experienced in welding including cracks, infusions and distortion. Generally these can be avoided by eliminating hydrogen, keeping temperature under control and controlling the atmospheric pressure of the environment.
under water welding or over seas
www.usinsuranceonline.com that's where i got mine and i am a mobile welder. Its under small business insurance, then under repairs, then under welding.
Under Coating
1. Surface Cracks 2. Under bead / HAZ crack 3. Root Crack 4. Inclusion 5. Concave profile 6. Weld undersize.
Read here under this section, very informative: http://en.wikipedia.org/wiki/Welding#Processes
Q1:- please tell me how to remove galvonic metal coating from sensitized paper with affecting the original print under coating Q2:. please tell me how to remove iodine+ black mixture of vasaline from sensitized paper with out affecting the original print under coating
no
When the weld is made from under the joint.
there is soil under the cracks so when the cracks come the there is normally just like planting a flower. so when it rains the plants grow.
TIG welding electrodes do not melt under most applications. Electrode means it carries electrical current. In MIG welding the wire becomes the electrode. In TIG and Gas Welding the filler material is called a rod. Stick welding uses rods called electrodes.