cassidym
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| posted on 9/7/04 at 10:03 PM |
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Prep Work
In some of the build pics the steel tubing is all shiny and clean while in others it is a bit greyish. Now the tubing that I bought in the past for
other projects were also greyish coloured.
Is this something to be concerned about?
I usually do'nt sand the joint I'm about to weld to shiny metal although I know the cleaner the joint the better the weld, but I've
read somewhere that the greyish part also serve as a kind of rust inhibitor. What do you suggest.
Also, I've read somewhere that if there is a gap of more than 1.5 mm between 2 tubes making up a joint, it is safer to cut a new to piece to get
a better fit.
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white130d
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| posted on 10/7/04 at 12:50 PM |
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Yep
The grey coating is a rust inhibitor, depending on the supplier, some of it is weld thru. I always wire brush the joint to be welded, no matter what
it is coated with, you can never have it to clean....
David
"There's only 2 things that money can't buy, and that's true love and home grown tomatos" Guy Clark
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blueshift
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| posted on 10/7/04 at 01:08 PM |
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cassidy, if you take the time to file the tubes carefully to get a perfect tight fit, you will have less of a problem with distortion.
I think the ideal is a tight fit with a bevel to help ensure good penetration.
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