Chengdu Branch-brand LH-42 Room Temperature Universal zinc phosphate solution

(Photo for the film microstructure micrograph) 1. Introduction: This product is only available for a normal (0 ~ 45 ℃) immersion phosphating solution used, highlighting the advantages is the film density, outstanding corrosion resistance, It can be used for inter-process takes a long time to rust-proof; and then coating products. Such as: auto parts, motorcycle parts, security doors, doors appliances and other products. This product is less sediment stability particularly strong, suitable for mass production use, more prominent advantages in the humid and rainy areas. 2. Composition: A component: a base liquid, green liquid C components: accelerator, pale yellow liquid 3. Method: Item Index Total acidity (point) 28 to 40 free acidity (point) 1.5 to 2.5 Promote the concentration ( Point) 2.5 to 4 treatment temperature (℃) at room temperature (0 to 40) Processing time (min) 10 ~ 16 4. soaking treatment process: Oil rust workpiece → conditioning → phosphating → washing → drying 5. detection and Add: total acidity (TA): Take 10ml phosphate solution in Erlenmeyer flask, add 50ml of distilled water, plus 2 to 3 drops of phenolphthalein indicator to 1mol / NaOH standard solution titration of L to the solution becomes pink as the end point, the NaOH consumed in ml of the total acidity, consumption of standard solution 1ml, total acidity 10:00. Free acidity (FA): 10ml of phosphate solution in Erlenmeyer flask, add 50ml of distilled water, add 1 to 2 drops of bromophenol blue indicator, titrated to the solution from yellow to blue as the end point, NaOH consumed in ml is free acidity, consumption of standard solution 1ml, free acidity 1:00. Add: As production continues, the concentration decreased need additional time to make it work was kept within the process. 6. Storage: plastic drum, stored in a cool ventilated place, shelf life of one year.