I have heard different methods described on this site but so far no one has mentioned acid cleaning to remove the oxidation. I bought some acid cleaner at the welding shop and the instructions said to apply let it sit for 5 min and wash off with water. Weld shortly after to make sure oxidation does ...

Hey Guys I really appreciate the prompt and professional replies to my questions on the gas tank. I will admit a gasoline tank for a boat is not my first choice of things to weld but it is for very good friend of mine that has helped me a lot in the past. Time to step up to the plate so to speak. I ...

no takers?

Hey, machinist by trade by like to weld also. I will be building a new alum gas tank for my friends boat. could you give me some tech help on material selection for this app (5/32 thk), filler rod series and diameter. Tungsten diameter for this material thickness. Also some tip on joint design as th...