It can only be measured by micron in units. Take a relatively more valuable gold -plated jewelry. The national standard only stipulates that the thickness of the gold and gold -plated layer is not less than 0.5 microns.
The potions of nickel -plating cylinders should still be said to be a nickel cylinder. If the potion in the nickel cylinder is not well maintained for a long time and the carbon treatment is not performed in time, then the electroplated nickel layer will easily produce chip -shaped crystals, and the hardness of the coating is increased and brittle enhanced. Severe problems with black plating layers. This is the focus of control that many people easily ignore. The thickness control of the nickel plating layer: This problem of the black -plating layer, how can the thickness of the nickel plating layer be said. In fact, the PCB electroplating layer is generally thin, and many of the surface problems reflected in the electroplating are caused by poor performance of electroplating nickel plating. The thin nickel plating layer will cause the product's appearance to be white and black. Therefore, this is the first choice for factory engineering and technical personnel to check. Generally, the thickness of the nickel layer with an electrophladic plating to about 5um is sufficient.
You can consider chemical plating, configure gold -plated potion: trichlot chloride, 5g/L, first dissolved with a small amount of pure water, and then use half of the water dissolved ammonium chloride 75g/L, sodium citrate 50g/L, sodium secondary phosphate 20g/L, nickel chloride 14g/L. Pour the golden water into the subsequent potion and stir, and then dilute it to the required volume. The parts must be removed first. You can use detergent or washing powder. It is best to clean it with ultrasonic waves, and then clean it with pure water. The temperature of the potion is almost boiling and then put in the part, stir every half an hour, and you can take it out for a few hours or you feel about it. The cost, except for hundreds of dollars a gram of chloride gold, is cheap.
Greater plating is actually attached to the surface of the object to form a thin layer of gold film. How thin is this layer? It can only be measured by micron in units. Take a relatively more valuable gold -plated jewelry. The national standard only stipulates that the thickness of the gold and gold -plated layer is not less than 0.5 microns.
n00:00 / 03: 0770% shortcut keys to describe space: Play / suspend ESC: exit full screen ↑: increase volume 10% ↓: reduced volume decrease by 10% →: single fast forward 5 seconds ←: single fast retreat 5 seconds Press hold up and hold it holding up. Here you can drag no longer appear in the player settings to reopen the small window shortcut key description
It can only be measured by micron in units. Take a relatively more valuable gold -plated jewelry. The national standard only stipulates that the thickness of the gold and gold -plated layer is not less than 0.5 microns.
The potions of nickel -plating cylinders should still be said to be a nickel cylinder. If the potion in the nickel cylinder is not well maintained for a long time and the carbon treatment is not performed in time, then the electroplated nickel layer will easily produce chip -shaped crystals, and the hardness of the coating is increased and brittle enhanced. Severe problems with black plating layers. This is the focus of control that many people easily ignore.
The thickness control of the nickel plating layer:
This problem of the black -plating layer, how can the thickness of the nickel plating layer be said. In fact, the PCB electroplating layer is generally thin, and many of the surface problems reflected in the electroplating are caused by poor performance of electroplating nickel plating.
The thin nickel plating layer will cause the product's appearance to be white and black. Therefore, this is the first choice for factory engineering and technical personnel to check. Generally, the thickness of the nickel layer with an electrophladic plating to about 5um is sufficient.
You can consider chemical plating, configure gold -plated potion: trichlot chloride, 5g/L, first dissolved with a small amount of pure water, and then use half of the water dissolved ammonium chloride 75g/L, sodium citrate 50g/L, sodium secondary phosphate 20g/L, nickel chloride 14g/L. Pour the golden water into the subsequent potion and stir, and then dilute it to the required volume. The parts must be removed first. You can use detergent or washing powder. It is best to clean it with ultrasonic waves, and then clean it with pure water. The temperature of the potion is almost boiling and then put in the part, stir every half an hour, and you can take it out for a few hours or you feel about it. The cost, except for hundreds of dollars a gram of chloride gold, is cheap.
Greater plating is actually attached to the surface of the object to form a thin layer of gold film. How thin is this layer? It can only be measured by micron in units. Take a relatively more valuable gold -plated jewelry. The national standard only stipulates that the thickness of the gold and gold -plated layer is not less than 0.5 microns.
n00:00 / 03: 0770% shortcut keys to describe space: Play / suspend ESC: exit full screen ↑: increase volume 10% ↓: reduced volume decrease by 10% →: single fast forward 5 seconds ←: single fast retreat 5 seconds Press hold up and hold it holding up. Here you can drag no longer appear in the player settings to reopen the small window shortcut key description