Why we can promise our powder coasting quality is excellent. Because we guarantee high quality finish of every step in a complex and multi-step process
We have zinc phosphate procedure including many steps: First step CLEANING OIL (Soaking time: 20 – 45 Min), next step is WASHING WATER (Overflowing, pH = 7 – 8, Soaking time: 3 – 5 mins, Step next rust removal H2S04 (15 – 20% Soaking time: 20 – 45 mins), next step WASHING WATER (pH = 6.5 – 7.5 Soaking time: 3 – 5 Min) Neutralize excess acid (pH = 8 – 11AL = 6 – 11 Soaking time: 3 – 7 Min) next step zinc phosphate (PH = 2.5-3 Soaking time: 25 – 45 Min), next step WASHING WATER (Overflowing; pH = 7 – 8 Soaking time: 3-5 Mins) and final step DRYING (Temperature = 110 – 130oC time: 40 – 50 Min). Please see file attach
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