一、Foreword：
Foreword: Copper lustring agent LT-120 is a high-temperature efficiency of the acid copper plating glossy agent. It has good ductility and homogenization electrolysis plot and be fine perforation electroplating, and is not harmful to the formation of decomposition products to avoid the frequent activated carbon treatment.
二、 Properties:
1、It has excellent electrical Properties -- (with the surface of the wall thickness is about 1:0.8);
2、Precipitation Involucra is good ductility;
3、It’s a stable lustering agent, decomposition resultant small and activated carbon processing cycle is long;
4、Gloss, formation and lining are very good;
5、high temperatures up to 40 ° C
三、Float and operating conditions：
|
Composition conditions |
range |
Standard |
|
Bluestone |
60-100g/L |
75g/L |
|
vitriol |
170-220g/L |
190g/L |
|
chloridion |
40-80mg/L |
50mg/L |
|
copper lustring agentLT-120 |
2-5ml/L |
2.5ml/L |
|
temperature |
20-40°C |
25°C |
|
The cathode current density |
10-40ASF |
25ASF |
|
mixture |
Mixing air and cathode Swing |
|
filter |
consistant filter |
四、 Method of set up bath tanke:
1、 Inject about 1 / 2 of water of the cleaned slot, heated to 50 ° C, then the add the required copper sulfate, mixing it fully dissolved；
2、 Slowly join the volume needed sulfate, also Stir well;
3、 Add activated carbon 3 - 5 g / L, stirring about four hours, rested after precipitation made activated carbon filter to the electroplating tank;
4、 Add the needed hydrochloride, and water to be determined by the volume;
5、 Current density 5ASF to do about 0.5A / L of the weak solution;
6、 Add the copper lustring agent LT-120 2.5ml/L
7、 To implement current density 5ASF about 0.5A / L electrolysis, and adjust the bath composition;
8、 Finally using 20ASF for 15 minutes then the plate can be tested.
五、The firm's management and operational conditions ：
1、 At least once a week Float analysis of the main salt content (copper sulfate, sulfate, chloride), and adjusted to the standard value;
2、 According to the different operational conditions glossy agent Recharge differences, usually every 4000-6000AH added LT-120 about a liter, to the extent possible, to add a small amount of added time, this would allow the bath with a good shakedown;
3、 Float appropriate operating temperature range of 23-40 ° C, ultra-high temperature will be lowered coating uniformity and shiny, glossy agent to increase consumption; The low temperature is easy charred;
4、 General cathode current density control in 10-between 30ASF
5、 The anode had better use phosphorus copper (P about H22%), anode bags must be used;
6、Have to mix with air, if it can swing with the cathode the effect will be better.
六、 Electrocoats performance
1、 Avarage electrocoat performane: LT-120 has an excellent avarage electrocoat performane, the surface-coating thickness ratio between plating surface and the thickness of the wall of the hole is about 1:0.8
2、 Current efficiency : LT-120 current efficiency of the bath liquor is about 90-99%
3、 involucra physical properties: As the difference of components of bath liquor and the operating conditions, the involucra properties are different too, standard conditions are set out in the following areas:
a、 tension stress 30-35kg/mm
b、elongation rate 19-24%；
c、 Hardness 110-130HV
七、 bath liquid Maintenance
1、 Ordinary maintenance：
1） Cycle : Depending on Copper Ball consumption (continuous production 1-2 weeks);
2） Solution:a、 Supplement copper grain
b、 Clean the contact points
c、 Using tiles blank to electrolyze (5ASF) for an hour;
d、 Change filter cotton, and filter with carbon core for four hours
2、 Major maintenance.
1） Cycle : 6 months – 1 year,
2） Steps : a, pumpe the electroplating solution to carbon bath and heated to 40 ° C;
b、 Adding hydrogen peroxide (2 - 5 ml / L) Keep the heat geostationary for 1-2 hours;
c、 Open air warming to 60 ° C, add active toner 3 - 5 g / L and keep the heat for 3-4 hours;
d、 Filter electroplating groove
e、 Using Low current density cylinder (5ASF) 0.5A / L electrolysis, and adjust the electrolysis liquor;
f、Finally using 20ASF to plate 15 minutes then then plane can be tested.
八、Packaging : copper lustring agent : 20L / soft plastic barrels
九、Electroplating Fault Causes and Solutions ：
|
problems |
reason |
solution |
|
High current area burnt |
The Copper concentration is too low
The temperature is too Low
Current density is too high, the current is focus on high current area |
Increase copper cocentration
Increase the temperature
depress the current density |
|
Low current district mist |
lustring agent is overdosed
Chloride ion is overdosed |
Using week electroanalysis
Using zinc powder processing |
|
Sheen bad |
lustring agent is not enought
temperature is too high
Chloride ion is overdosed
Sulfate concentrations decline |
Add more lustring agent
Lower the temperature
Using zinc powder processing
Supplement Sulfate |
|
Sheen uneven
（Spots and SKIP） |
The organic impurity
Chloride ion is not enough
lustring agent is not enought
Previous handling is bad |
Using activated carbon treatment
Supplement chloride ion
Increase lustring agent
Check previous handling |
|
Uniformity -- a decline
|
The copper concentration is too high
Sulfate concentration is too low
temperature is too high
Chloride ion is overdosed
lustring agent is overdosed |
Lower to standard
Increase to standard concentration
Lower to standard degree
Using zinc powder processing
Using week electroanalysis |
|
Properties not good |
lustring agent is overdose
Accumulation of decomposition products
Bath composition bad |
Using week electroanalysis
Using activated carbon treatment
Analyse and adjust |
十、 Anaylse method：
（Ⅰ） Test of CuSO4:
1、 Add 1ml plate liquor to 250 ml cone bottle;
2、 Add 150ml water and 5ml ammonia;
3、 Add 0.2 grams Murexide indicator;
4、 Using 0.1 (M) EDTA standard solution to titrate from brown to blue violet.
5、 Calculation : CuSO4 (g / L) = 12.5 * 0.1 (M) Titrate EDTA standard solution ml
6、 Control range：60-90 g/L
（Ⅱ） Test of H2SO4：
1、 Add 1ml plate liquor to 250 ml cone bottle;
2、 plus 50ml water droplets and 3-5 methyl orange indicator;
3、 Using 1.0 (M) NAOH standard solution to titrat it into yellow.
4、calculated : H2SO4% (V / V) = 2.663 * 1.0 (M) NAOH titrate ml
5、Control range:9-11%
（Ⅲ） Test of CL-：
1、 Add 25ml plate liquor to 250 ml cone bottle;
2、Add 30ml water and 20ml1 :1 nitrate;
3、Add 0.1 (M) a few drops of nitrate mercury standard titration;
4、Using 0.01 (M) nitrate mercury standard titration to change into clarification from turbidity.
5、Calculation : CL - (ppm) * 0.01 = 14.2 (M) nitrate mercury standard titration ml number
6、control range：40-80ppm |
