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Questions concerning iron and steel, steel making, rod rolling, galvanizing, springs, nails, fencing, and patenting go here.

TOPIC: Checking cleanliness of wire

Checking cleanliness of wire 2 years 7 months ago #922

We are currently drawing steel wire in diameters from .197 to .437 to be welded. We clean in an alkaline based cleaner after draw and before weld. Does anyone have any suggestions for determining if the wire is clean enough to be welded? Currently it is just a visual or occasionally wiping the wire with a clean towel to see if anything rubs off. Would like something more definite.
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Re: Checking cleanliness of wire 2 years 7 months ago #923

Hello,

Instead of continually checking, wouldn't it be great if there was no dirt on the wire at all.

I suggest you carefully check out these web sites:

DynaPower Inc. www.dynapowerinc.com/ (The demonstration I witnessed was quite impressive.)

GEO-Reinigungstechnik GmbH www.geo-reinigungstechnik.de/en/ (Note that there is an English version.)

Plasmait GmbH (Austria) www.plasmait.com Plasma wire cleaning.

Vapor Blast Manufacturing Company (Liquid Honing) www.vaporblast.com/ (I once saw inner coax conductor liquid honed before expanded polystyrene insulation was extruded onto it.)

Kindest regards,
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
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Re: Checking cleanliness of wire 2 years 7 months ago #924

Thanks for the reply. An investment in a new cleaning process is not an option for us right now.

I guess what I am looking for is a quick way to confirm that the wire is clean enough to be welded.

Wave of the Future
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Re: Checking cleanliness of wire 2 years 7 months ago #925

I am assuming you have made sure that your drawing soaps and lubes are water soluble - as much as possible - most likely sodium or a blend. The old toilet paper test for a set period of time is not a bad empirical test. You can use a gram scale to measure gross residue or take it further (quantifiable results) and get a lab to do an ether extraction residue analysis.
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