Learn how moisture may affect SJ601 flux, weld hydrogen, porosity, feeding, slag behavior, and the steps operators should take.
Moisture-contaminated submerged arc flux may look normal. The absence of visible water or clumping does not prove that SJ601 is dry enough for production.
What Welding Problems May Occur?
Potential effects include:
- Increased diffusible hydrogen
- Weld-metal porosity
- Unstable arc behavior
- Irregular slag release
- Changes in bead appearance
- Particle breakdown or clumping
- Inconsistent mechanical test results
These symptoms are not unique to wet flux. Wire contamination, poor grounding, incorrect voltage, joint contamination, and equipment problems can cause similar defects.
How Does Flux Become Wet?
Common causes include open bags, uncovered hoppers, condensation, floor storage, leaky recovery systems, and mixing dry flux with damp returned material.
What Should Operators Do?
- Isolate the suspected material.
- Record its storage and handling history.
- Do not blend it with dry flux.
- Consult the specific redrying instructions.
- Inspect packaging and recovery equipment.
- Verify weld quality before returning it to production.
- Discard flux contaminated by oil, chemicals, or unknown products.
Can Wet Flux Always Be Recovered?
No. Redrying may address moisture but cannot remove oil, rust, slag, or foreign-flux contamination.
Dayang Welding recommends sealed storage, clean handling, and documented moisture control for SJ601 throughout shipping, warehousing, and production.
