Process flow
Pre-treatment--Anodizing--Pore sealing
Process parameters
Nickel ion: 1.0--1.3g/L
PH value: 5.4--5.6
Temperature: 60--65℃
Time: about 8 minutes per 10μm oxide film thickness,
Sealing tank assay method:
Take 5ml of tank liquid into 250ml conical flask.
Add 50-100ml pure water
Add 10ml (PH=10) ammonia-ammonium chloride buffer.
Add a small amount of ammonium urea acid (powder) batch agent
Drop with 0.05N EDTA standard solution until the sulfonic acid turns purple-red as the end point.
Record the number of good milliliters (V) of the drop dropped (Note: about 1 g of potassium fluoride for medium temperature sealing of the hole)
Calculation formula:
Seal hole tank (nickel ion) = 11.74 x N x V
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