SaitechLabs MPTC AI
Degreasing QA Tools • 29-04-2026 02:53
Degreasing Troubleshooting
Select issue
Oil not removing completely
Foaming in spray system
Diagnose
Water-Break Test (QC)
Observation
Continuous film
Partial break
Beading
Immediate break
Time to break (seconds)
Evaluate
Gravimetric Cleanliness (mg/dm²)
Weight before (g)
Weight after (g)
Area exposed (dm²)
Calculate
FA/TA Calculator (Degreasing)
Sample volume (mL)
Acid normality (N)
mL acid to PP endpoint (FA: Free alkalinity)
Total mL acid to MO endpoint (TA: Total alkalinity)
Calculate
Chemistry Notes (Degreasing FA/TA)
What TA means (PP endpoint ~ pH 8.3)
TA indicates active alkalinity (mainly OH⁻ / strong base contribution).
It is used to trend bath depletion, drag-out and dilution.
What Total Alkalinity means (MO endpoint ~ pH 4.3)
Total alkalinity indicates total neutralization capacity: OH⁻ + CO₃²⁻/HCO₃⁻ + silicate/borate type alkalinity.
It helps detect carbonate build-up and buffering effects.
Core calculation
eq/L = (mL acid × Normality) / (sample mL).
Trend TA and Total with constant sample volume, same acid normality and consistent endpoints.
How to interpret trends (practical)
TA decreases: bath depletion, drag-out, dilution, poor replenishment.
Total rises but cleaning worsens: carbonate build-up and/or high soil (oil) loading.
Titration does not measure surfactant health; confirm with water-break test and oil separation/skim rate.
Best practice
Maintain fixed sample volume and fixed acid normality (e.g., 10 mL sample, 0.1 N HCl).
Record bath temperature and sampling location (spray header / tank).
Log TA, Total, pH, conductivity (optional) and oil load observation.