Low hydrogen embrittlement
Safer for high-tensile spring steel and precision components
Surface Prep · Process-engineered chemistry
UNISOLVEDe-Rust Chemical
Safe De-Rusting for High-Tensile and Precision Steel
Low HE RiskH₃PO₄/H₂SO₄InhibitedMild Passivation
01 / Product brief
Safe De-Rusting for High-Tensile and Precision Steel
Inhibited sulfuric/phosphoric acid-based de-rusting compound for light-to-medium rust removal on ferrous metal. Lower hydrogen embrittlement risk than HCl systems. Phosphoric acid variant leaves a thin iron phosphate conversion layer, combining rust removal with mild passivation in a single step.
Phosphoric acid variant simultaneously removes rust and deposits amorphous phosphate — reducing process stages for light-duty applications. Lower embrittlement risk versus HCl makes it the preferred choice for high-tensile spring steel and precision components.
02 / Performance
Key process advantages
Product-specific outcomes for production quality, operating control and line performance.
Dual-action phosphoric acid
Removes rust and deposits mild conversion coating in one step
Controlled dwell time
Inhibitor package prevents base metal attack on tight-tolerance parts
04 / Process position
Where it works in the line
Applied at Stage 2 (De-rust) for light-to-medium rust removal — the phosphoric acid variant simultaneously deposits a mild conversion coating.
- 01
Degrease
Process stage
- 02
Rinse
Process stage
- 03
De-rust
Applied at Stage 2 (De-rust) for light-to-medium rust removal — the phosphoric acid variant simultaneously deposits a mild conversion coating.
- 04
Rinse
Process stage
- 05
Condition
Process stage
- 06
Phosphate
Process stage
- 07
Passivate
Process stage
- 08
Rinse
Process stage
- 09
Dry
Process stage
05 / Applications
Specified for real production demands
Typical applications and substrate conditions for UNISOLVE.
Light rust removal on cold-rolled steel before painting
- High-Tensile Steel
High-tensile steel components sensitive to hydrogen embrittlement
- Spring Steel
Precision parts where dimensional tolerance limits acid dwell time
- Precision Components
Batch rust removal where mild passivation is acceptable as a follow-on
- Cold-Rolled Steel
Technical support
Validate UNISOLVE on your line.
Share your substrate, current bath, throughput and finishing system. Our process team will recommend a practical trial window.