Surface treatment method and process of copper bar copper tube

1. Paint the copper bar
This craft belongs to eliminate backward craft, seldom use now. Process: Three-phase AC circuit bus shall be painted with black paint, and color code shall be pasted in conspicuous places. Phase A shall be yellow, phase B shall be green, and phase C shall be red. Neutral line or neutral line shall be painted with light blue paint.
2. Tin plating on copper bar
Advantages: mature process. Short operation cycle, commonly used. Weakness: long time surface hair dark, hands can not do. Not environmental protection!
Process flow: surface polishing, oil removal and other pretreatment → pure water washing → plating high Pb-Sn alloy tap water washing → pure water washing → tin plating → tap water spray washing → neutralization (Na2HPO4+Na3PO4)→ tap water spray washing → dip stearic acid → tap water spray washing → hot pure water dip washing → drying.
3. Copper bar coated with protective agent
Advantages: to maintain the copper bar primary color, slightly lower than the cost of tin plating. Disadvantages: Long operation cycle.
Process flow: polishing pre-treatment → pure water washing → pickling passivation workpiece → drying moisture →JLR-510 protection treatment → flowing water cleaning → hot water immersion (about 100℃, to be used for heating workpiece, the purpose of water evaporation or drying) → drying → packaging closed.
A copper pipe automatic winding and unwinding line is characterized in that it comprises a winding device, a supporting device, a cleaning device, a leveling device and a winding device which are successively set along the walking direction of the copper pipe in the process of winding and unwinding. Wherein, the unwinding device, the unwinding device for the copper tube unwinding; Copper tube support device, the support device is used to support the unwinding device after the unwinding copper tube;