Technical specifications
FIPROPHOS 538 is a liquid phospho-degreaser specifically designed for the treatment of ferrous metal workpieces in spray or immersion systems. Formulated with a special detergent package, it provides good results even at room temperature, without foaming on the surface of the pretreatment bath and in the relative rinses. It forms an iron phosphate coating on the treated metal with a weight ranging between 0.2 to 0,6 g/m2, which improves paint adhesion and, at the same time, increases resistance to under-film corrosion.
FIPROPHOS 538 minimizes oxidation phenomena resulting from system shutdowns, such as during shutdowns for extraordinary maintenance operations.
Should workpieces heavily contaminated with oils or greases need to be treated, the Fiprokim Technical Service will provide recommendations for the use of a suitable degreasing additive.
After treatment with FIPROPHOS 538, the material must first be spray-rinsed at a pressure of (1 to 2 bar) with continuous renewal, for 1 to 3 minutes at room temperature, and subsequently with demineralized water.
Use and Applications
FIPROPHOS 538 must be used in an aqueous solution by spray or immersion, under the following operating conditions:
Treatment time: 1 ¸ 4 minutes
Operating temperature: 20 ¸ 50°C
Concentration: 10 ¸ 30 g/l
Bath points: 2.8 ¸ 8.4 points of total acidity
Parametro | Valore |
|---|---|
PREPARATION OF SOLUTIONS
For every 1000 liters of solution, use from 10 to 30 kg of FIPROPHOS 538.
Fill the tank with water and bring it to the operating temperature; then add the predetermined quantity of FIPROPHOS 538 with the pumps running and circulate the solution for at least 10 minutes before introducing the first material to be treated.
Applicazione | Concentrazione |
|---|---|
Bath control
Take 10 ml of sample
Add 4-5 drops of phenolphthalein indicator and titrate with a 0.1 N sodium hydroxide solution.
The number of ml of 0.1 N sodium hydroxide used represents the bath points.
For a bath prepared at 20 g/l, it should be approximately 5.6.
Power supply
For each missing point of acidity, add 3.6 kg of FIPROPHOS 538 per 1000 l of bath.
Warnings
All parts in contact with FIPROPHOS 538 can be constructed from AISI 304 steel; avoid yellow alloys in pumps and valves.
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