Quick answer
Processes for different metals are not equivalent simply because they are called passivation. Confirm alloy grade, surface condition, pretreatment and corrosion acceptance criteria first.
Selection and validation
The catalogue distinguishes QAL-45 for chromium-free die-cast aluminium passivation, QPA-810 for natural-finish stainless steel passivation, and QMg-530A/B for magnesium alloys. Review each against its intended substrate without transferring operating conditions.
Determine the need for degreasing, dewaxing or other pretreatment from contamination and the technical plan. Include rinsing, drying, finish and downstream requirements in trial acceptance.
Before a component trial
- Alloy grade, finish and actual contamination.
- Equipment, trial concentration, temperature, time and water quality.
- Rinsing, drying, downstream requirements and agreed acceptance criteria.
Check documentation: Product models · Certificate and test report originals · Request model-specific TDS / SDS
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