|
Trouble
|
Cause
|
Processing Method
|
| (1)Burning of the layer |
a) Solution temperature lower than 20℃
b) too low copper content
(lower than 50g，gravity lower than 20。Baume)
c) Too much 310A
d) Lack of 310B |
a) Increase the liquid temperature to 24-28℃
b) Add cupric surphate
(add 15g/l cupric curphate to increase 1 Baume / 3.7g/l
copper)
c) Electrolyse the surplus 310A，or add 30% H2O2(0.1-0.2ml/l),
or put a bit active carbon into the filtration pump.
d) Add 310B at the proportion of 0.2ml/l
|
| (2)Chain strip on the HCD |
a) Lack of opening agent
b) Lack of chloride ion |
a) Add opening agent at the proportion
of 5 ml/l
b) Through chemical analysis, adjust the chloride ion to 80mg/l |
| (3)Weak brightness in the LCD |
a) Solution temperature over 30℃
b) Too much 310B
c) Lack of opening agent
d) Organic pollution |
a) Decrease the temperature
b) Electrolyse the surplus 310B
c) Add the opening agent at the proportion of 3-5ml/l
d) Add the potassium/ natrium permanganate at the proportion of 50-100ml/l |
| (4)Sudden leveling weakness in the LCD |
Too much 310A |
Refer to (1)C |
| (5)Weak brightness in the LCD |
a) Lack of 310A与310B
b) Too much chloride ion (higher than 150 ml/l) |
a) Add sufficient 310A and 310B
b) Add zinc powder at the proportion of 1g/l, or 1% silver
sulfate solution
(4.4ml/l, precipitable
10mg/l chloride ion) |
| (6)Performance failure of the brightener |
Organic pollution |
a) Add potassium/ natrium permanganate
at the proportion of 50-100mg/ll
b) Add active carbon powder at the proportion of 5-10g/l
supplemented with the opening agent at the proportion of 5ml/l, 310A
0.5ml/l, and sufficient wetting agent. |
| (7)Large brightener consumption |
a) solution temperature over 30℃
b) improper 310A:310B ratio
c) improper or too much filter aid
d) too much dirt on the anode surface |
a) Cool the solution down to 24-28℃
b) Adjust the 310A:310B ratio.
c) The filtration aid amount shall be 300-500g/m2
d) improper anode or excessive anodic current density (within 2.5A/dm2) |
| (8)Weak binding force of the bright nickel
layer on the cupric sulphate |
too much 310A ( over 1ml/l) |
Electrolyse the plated cupric sulphate
in the 10-50g/l sodium hydroxide for 30 seconds (20℃)，or
refer to (1)C |
| (9)weak binding force of the cupric
culphate layer on the nickel |
sulphide in the solution |
Apply the semi-bright nickel solution
without sulfur |
| (10)minor pinhole on the layer |
a) air in the filtration pump
b) improper air stirring
c) lack of wetting agent
d) lack of opening agent |
a) Keep the filtration pump inlet off
the air stirring position to prevent it from taking in bubbles.
b) Keep enough air vent
(DM: not less than 3mm)
c) Add 1-2ml/l wetting agent. Keep enough opening agent.
d) Add 5ml/l 310 opening agent |
| (11)Minor particles spreading the layer |
a) Suspended particles in the solution
(such as the active carbon powder)
b) air pollution
(such as grease, dust, etc.)
c) The burning layer creates a spongy layer
d) lack of full filtration when the cupric sulphate is added.
e) improper anode
(such as the anode without phosphorus, which will cause
scarlet anodic mud on the surface)
|
a) dilute the solution
b) dilute the solution
c) refer to (5)b
d) cleanse the anodic bag
e) dilute the solution |
| (12)anode inactivation |
a) over capacity of vitriol (over 65g/l)
b) over capacity of copper (over 60g/l)
c) over capacity of chloride ion (over 120g/l)
d) blocked anodic bag
e) too high solution gravity resulting from the pollution
of large quantities of iron impurities |
a) dilute the solution
b) dilute the solution
c) refer to (5)b
d) cleanse the anodic bag
e) dilute the solution |
