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Ck Worldwide Inc Tungsten Electrodes, 30 Pack locks_l4_locks_l3_office_l2_office_supplies_l1|en_CA Ces jolis articles de bureauTIG welding electrodes usually contain small quantities of metallic oxides which can offer the following benefits: Facilitate arc starting Increase arc stability Improve current carrying capacity of the electrode Reduce the risk of weld contamination Increase electrode life. Oxides used are primarily zirconium, thorium, lanthanum or cerium. Additions are 1% 4%, improve arc initiation, especially when direct current (DC) welding is employed. Thorium