Step 1: Cleaning, Caustics and Abrasives
Step 2: Oxides Are Your Enemy.
make you you look bad
you need to complete ly rid immediate heat affected area of these nasty insulators. caustics followed by solvents then onto dress passes works almost every time.
Step 3: How to Make a Cathode Ray Tube Without a Tube
electrons have mass, if you dony belive me, just try and tig weld next to an electo magnetic feild. the flow of elecrons will go wacky. thats all I know
but heres thed deal with ac and dirty aluminum castings. when the work is neg and the torch is poss, the flow of electons cleans the weldpool by dislodging oxides and other smutch, alowing the otherwise unweldable junck to, melt together
Step 4: Preheat
Step 5: Electrons Have Mass, I Can Prove It
cathode ray tube without the tube
AC arch welding takes place between the electrode and the work.
(remember to double ground as aluminum is a poor conductor and will scar and scab if you just set your work on the table and go to town. I clamp my clamps when I remember, when I forget, I hand in scabby work and usually miss out on pay, and have to endure the rumors that I'm loosing my touch)
Step 6: This Job Is Stupid But It Pays,
It only needs done so so the mechanic doesn't have an excuse to mail it back