University electropolishing research
At Metal Science Technologies we are driven by science and are working with the premier Universities, the leading stainless steel suppliers and ASX 100 companies to ensure we provide proven and the most effective post weld finishing.
“Welds cleaned with a TIG CHAMP BRUSH using DC have significantly better corrosion resistance due to reduced micro scale and removal of large grain boundaries which lead to pitting (corrosion) than Pickling Paste and an electrochemical Cleaning Brush using Alternating Current AC.AC also shows signs of contamination”.
– Intelligent Polymer Research Institute University of Wollongong NSW 2522 Australia and Metal Science Technologies.
View PDF UOW Report SEM
Stainless Steel Post Weld Finishing & Post Fabrication Clean Up
View PDF Technical Review Post Weld Finishing
The excellent corrosion resistance of stainless steel can only be achieved if proper cleaning and finishing operations are carried out after any fabrication process as there will have been damage to the surface condition. The corrosion resistance of stainless steel arises from a chromium oxide film that forms a
protective layer naturally on the surface of the steel. The chromium oxide film is extremely thin, a few angstroms, but strongly adherent and chemically stable which is commonly referred to as ‘passive’. The film is formed when chromium reacts with oxygen. The film may be described in chemical terms as a Chromium iii oxide (Cr2O3 )
Studies have shown that a range of toxic entities are created as fumes when an AC electrochemical brush weld cleaning machine is used, which pose a hazard to the operator. Some of these will also be present when a TIG CHAMP BRUSH DC Plus is used with EX 50 or Ex 75 Solutions.
View PDF Research_Weld Cleaning methods
Cleaning of stainless steel weldments is particularly important in order to achieve adequate corrosion resistance after welding. Methods such as mechanical and chemical cleaning are typically used. Recently, electrochemical methods have also been employed where pickling pastes are considered dangerous for OH&S reasons.
OUR RESEARCH PARTNERS:
NSW Office for Science & Medical Research Industry and Investment NSW