F-3
Product features
Steel surface without phosphate conversion coating
Composition and properties
The corrosion resistance of F-3 is greater than or equal to iron phosphating / polymer closed with no chromium after washing. Apply to room temperature, spraying or dipping treatment, after treatment with deionized water. F-3 can match and various types of coating.
Application range
F-3 is a chemical treatment with no phosphate reaction type, particularly suitable for iron and steel, zinc and aluminum surface treatment. Does not contain heavy metals, can enhance the coating adhesion and corrosion resistance.
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Method of use
Each 1000L of the bath add
F-3 50.3-70.3kg
Stir in the final pH value, available Additive-119 adjustment
Each to reduce the value of pH 0.1 to 1000L bath containing about 1-2L Additive-119
Different processing time for each 1000L of the bath in the amount of F-3
The processing time of 20~45S, each 1000L of the tank 70kg
The processing time of 90~120S, each 1000L of the tank 60kg
The processing time is larger than 180S, each 1000L of the tank 50kg
The bath concentration 3-7%
20 - 180 S
At room temperature
The spray pressure of 0.5 - 1.5bar
Summary: the different process parameters of the production line, need to adjust according to the actual situation of the above process parameters
Process description
1 cleaning
The 2 washing
3 Di water rinse
4 conversion coating
The 5 washing
6 DI water rinse
7 drying
1 cleaning the best use of alkaline cleaning system appropriate, refer to the relevant product specifications.
The 2 washing should maintain continuous overflow to avoid contamination
3 Di water rinse conversion coating with DI water rinse, should maintain a continuous overflow to avoid contamination
4 conversion coating retention parameter in the recommended range
The 5 washing should maintain continuous overflow to avoid contamination
6 DI water rinse continuous overflow, control the conductivity below 25us/cm.
7 drying recommended fast complete drying, drying oven indirect heating to 110-170 ℃ for 10-20 minutes
Concentration
According to the concentration of choice for time processing.
Determination
PH measurement
The precision pH fluoride ion stable meter. Can also be used for accurate pH test paper.
Recommended pH range: 3.8~5.5
The pH value decreased 0.1: each 1000L bath, add 5-6L F-3.
The pH value increased 0.1: each 1000L bath, add 1-2L Additive-119.
Often the best test of pH value, adding a small amount of F-3 and Additive -119, to avoid the sharp adjustment of pH and chemicals.