31 ATOM ARC® Iron Powder Low Hydrogen Electrodes The introduction of iron powder into low hydrogen electrodes greatly increased productivity, making the use of Atom Arc for most welding operations more than competitive with common mild steel electrodes in overall cost.  The real advantage of course is that by improving the efficiency of welding operations, fabricators have a means of equalizing increasing overhead and labor costs. Moisture Resistant Coating Atom Arc electrodes are manufactured with a flux coating that effectively resists moisture pick-up for many hours after the container is opened. This improved coating provides an extra degree of reliability, especially for electrodes exposed to high temperature, high humidity working conditions. Typical % Moisture in Atom Arc Coatings It should be noted that even though Atom Arc electrodes resist moisture pick-up longer than ever before, no moisture resistant electrode will eliminate the need for storage and rebake ovens or the necessity to follow code requirements for allowable exposure times. The graph above shows the rate of moisture pick-up of Atom Arc electrodes. 0.5 0.4 0.3 0.2 0.1 0 As 1 Hr. 2 Hr. 4 Hr. 8 Hr. 24 48 96 Rcv’d 70 Deg. F/70% R.H. 80 Deg. F/80% R.H Continued on next page...
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