BO black oxidation is a solution for copper chemical oxidation and development of a processing solution, it can provide PCB ideal combination of power, the meeting dealt with oxidation on the surface of uniform and fine, and black surface of different types of resins combine good results, the scope of their operation, and formation of surface soon, will be made for stripping high-intensity, and the PT reprocessing Combined with the use and eliminate the "pink circle" phenomenon.
一.Physical and chemical properties :
BO-BO F-A
Appearance : pale yellow liquid colorless liquid
Lighting : non-flammable, non-combustible materials goods
Weight (g / ml) : 1. 26 1. 11
Temperature : 5 ° C above 5 ° C above
Daily : 0 ° C 0 ° C
PH :> 12> 12
Odor : a small amount of chlorine taste tasteless
二. Solution preparation :
Prepreg cylinder : DO-1 5%.
Black of cylinder : Water 32%
BO-A 33%
BO-F 36%
三. The operating conditions :
The scope of the best values
Prepreg cylinder : Temperature at room temperature at room temperature
Time 50 seconds 40-53 seconds
Free base 4 g / L 3 - 6g / L
Black of cylinder : 70 ° C temperature 68-72 ° C
Five minutes time 5-8 minutes
BO-A 330ml / L 320-350ml / L
BO-360ml F / L 330-380ml / L
四. Management and maintenance
(1) BO-F analysis
(A) reagents
1,0.1 NNa2S2O3 standard solution
2, KI solution 2,10%
3,25% H2SO4
4,5% starch solution
(A) Methods
1,from The size tapered bottle in the sample by adding 30ml water, 4gKI solution mixing bowl.
2, Canada 20ml25% H2SO4 (KI not possible before H2SO4), the reuse of 0.1N sodium thiosulfate solution titration easier to increase starch five drop to blue titration to disappear, records titration volume.
(B) Calculation
BO-F (%) = 7.07 × (V. N) Na2S2O3/Vs
(2) BO-A Analysis
(A) reagents
1,0.1 NHCL Solution
2, phenolphthalein indicator
(B) Methods
1,from 2.0ml samples in conical bottle, plus 50ml of water, drop by drop three phenolphthalein indicator, shaking.
2, 0.1NHCL used for titration solution, the solution from red into colorless, 71/92 record volume.
(C) Calculation
BO-A (%) = 50 × (V. N) HCL / Vs
(3) black layer thickness
(A) reagents materials and equipment
1, the balance (with an accuracy of 0.0001 g)
2, CCL (3 cm x 3 cm), the first plate mill
3, 10% H2SO4
(B) Methods
1,An intake has been grinding off of copper Add black cylinder address.
2, after treatment, clean water, hot hair dryer drying, weighing for W1.
3, weighing black tablet Add 10% H2SO4 (room temperature 5 minutes), the Baptist after copper extraction, drying, weighing as W2.
(C) Calculation
Black layer thickness (mg/cm2) = (W1 - W2) / board area
五.Bath maintenance :
1, production added : producing 100 ㎡ at the following additions
DO-1 1L BO-A 3L BO-F 4-6L
2-for-groove : Black of producing 12,000 ㎡ re-allocation slot. Prepreg production per 500 ㎡ re-allocation slot.
六.Wastewater treatment : a liter each treatment containing 100 g / L oxidants black liquid need DES Na2S2O3.
1, with three water dilution of a black fluid, slowly in each 20 g / L of sodium thiosulfate joined diluent, each additional 20 minutes after the second Na2S2O3 increase, plus the last 20 g / L of sodium thiosulfate, and stirring for 15 minutes.
2, with 20% solution of sulfuric acid and pH to 7-8. (Note : There will release a lot of heat!)
七 .Stockpiling : stored in the original containers, placed in the 10-30 ° C dry place away from the acid and easily oxidized material. Not under the sun exposure.
八. Security codes BO black oxide solution is a strong oxidant, can cause severe burns to the eyes, skin and mucous membranes. Contact should wear rubber gloves and eye goggles. As to the Solution burns and spent a lot of water washing, at least 10 minutes and immediately seek medical treatment.
Black liquid can not be mixed with combustible material, such as recyclable materials to wash with water, and should not be mixed with acid or will cause toxic gas
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