Barge hull repair?
Barge hull repair?
(OP)
Carrying out welded repairs to the hull of a 100yr old steel barge, and having major problems with the weld gassing, if I try to weld using anything other than 2inch back step technique (in some areas this doesnt work either). I am using a 376amp, mig set, with 1mm wire and Ar/Co2 gas.
I feel the problems are being caused by corrosion being present in the rivetted joint adjacent to the weld joint, and anything other than short welds is causing problems. I would be very grateful if anyone could offer any advice, on how this problem might be eased a little.
Willard
I feel the problems are being caused by corrosion being present in the rivetted joint adjacent to the weld joint, and anything other than short welds is causing problems. I would be very grateful if anyone could offer any advice, on how this problem might be eased a little.
Willard
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RE: Barge hull repair?
YOU ARE ENCOUNTERING A VERY COMMON PROBLEM WHEN WORKING WITH THE MIG PROCESS ON ANY TYPE OF CORRODED STEEL. IT WOULD BE TO YOUR ADVANTAGE TO UTILIZE THE SMAW (STICK) PROCESS WITH A LOW HYDROGEN ELECTRODE SUCH AS ER7018.THE COMBINATION OF THE CLEANSERS IN THE FLUX AND THE LOW HYDROGEN CHARACTERISTIC WILL BE A BIG BENEFIT.
RE: Barge hull repair?
Rod
RE: Barge hull repair?
Rod
RE: Barge hull repair?
You should be employing the FCAW process. Although SMAW is perfectly acceptable as well, you need a high deposition process that will cut through the mill scale.
FCAW - E70T-1 is an all position wire, designed to give give you superior mechanical properties with X-ray quality. It employs a 100% CO2 shielding gas. It gives low spatter , with a soft arc.