Mig Welding Aluminum Problem – Black Powder Residue
I had a struggle recently trying to solve a mig welding aluminum problem. I do a lot of aluminum mig welding, primarily with 4043 wire and always wonder, what is that black powdery residue on the edges of the weld? Was it soot? If so, where would the carbon be coming from? Was the argon sucking in carbon dioxide from the atmosphere (venturi principle) and contaminating the weld?
Normally I recommend to clients that they bolt their outdoor sculpture to a 4-6″ thick concrete pad with four to eight bolts, depending on the size of the sculpture. The major concerns are high winds and theft. (During the period when the US was selling all its scrap steel to China, one local sculptor had three of his steel sculptures stolen from outside his studio. What a heart breaker. They probably went straight to the scrap yard and then to China.)
Sculpture Workshop: Time
Chess Clock – ever wonder how much time you are actually in the shop? Wondering why your projects are taking so long to finish? It is very easy to take a restroom break, grab another cup of coffee, do an email quote, return a phone call – suddenly an hour has gone by. This clock will keep you honest.