What type of SAW flux should not be reused?

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Multiple Choice

What type of SAW flux should not be reused?

Explanation:
Bonded (agglomerated) flux relies on a binder to glue small particles into lumps. After use, that binder is compromised and any moisture absorbed by the flux can become trapped. Reusing this type would reintroduce moisture and binder residues into the weld area, increasing hydrogen in the weld pool and raising the risk of porosity and weld defects. The agglomerated structure also tends to break down and lose uniform flow, leading to unstable slag coverage if reused. Because the binder and moisture aren’t reliably removable or restorable through simple reconditioning, bonded flux isn’t reused. Other flux forms—fused, ceramic, and inert—are more amenable to reconditioning or reuse after cleaning, screening, or reprocessing, without introducing the same moisture/binder issues.

Bonded (agglomerated) flux relies on a binder to glue small particles into lumps. After use, that binder is compromised and any moisture absorbed by the flux can become trapped. Reusing this type would reintroduce moisture and binder residues into the weld area, increasing hydrogen in the weld pool and raising the risk of porosity and weld defects. The agglomerated structure also tends to break down and lose uniform flow, leading to unstable slag coverage if reused. Because the binder and moisture aren’t reliably removable or restorable through simple reconditioning, bonded flux isn’t reused. Other flux forms—fused, ceramic, and inert—are more amenable to reconditioning or reuse after cleaning, screening, or reprocessing, without introducing the same moisture/binder issues.

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