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- W82009263 abstract "Electrochemical reactions could be an important factor governing the chemistry of weld pools in dc welding. The anodic reaction at the weld wire-slag interface leads to a relatively high Po/sub 2/ which leads to the formation of an oxide nO/sup 2 -/ + M(metal) ..-->.. MO/sub n/ + 2ne where M is a metal at the weld wire-slag interface and n is related to the valence of M in the oxide. After the molten weld wire forms a droplet which separates from the wire, the electrochemical reaction ceases and the oxide dissolves in the flux. The cathodic reactions at the weld pool lead to the electrodeposition of metals M/sup 2 +/(slag) + 2e ..-->.. M(metal); Si/sup 4 +/(slag) + 4e ..-->.. Si(metal) where M can be Fe/sup 2 +/, Mn/sup 2 +/. or other metals which are electrodeposited at the interface. The relative amounts of all these deposits wil be readjusted by chemical reactions such as Si(metal) + 2MO(slag) ..-->.. SiO/sub 2/(slag) + 2M(metal); Mn(metal) + FeO(slag) ..-->.. MnO(slag) + Fe(metal). The resultant changes in the compositions of the weld metal and the slag depend on the rates of the electrodeposition reactions relative to the rates of the back reactions.more » If the proposed mechanism is correct, experimental data would indicate that both the electrochemical and back reactions appear to be important. Analogous electrochemical reactions can occur at metal-plasma interfaces.« less" @default.
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- W82009263 date "1986-01-01" @default.
- W82009263 modified "2023-09-27" @default.
- W82009263 title "Electrochemical effects on weld pool chemistry in submerged arc and dc electroslag welding" @default.
- W82009263 hasPublicationYear "1986" @default.
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