Tin zinc barrel plating line chromate conversion rectifier electroplating

Hot Saller Tin zinc barrel plating line chromate conversion rectifier electroplating Only USD $75.200.00 Good Condition and ready to use Come with 1 year warranty. A comprehensive tin-zinc barrel electroplating line requires an integrated system of process tanks, mechanical barrel assemblies, a precise rectification unit, and dedicated chemical post-treatment stages for chromate conversion. Tin-zinc alloy plating (typically 70-80% tin and 20-30% zinc) provides exceptional corrosion resistance, excellent solderability, and a ductile finish, making it a premier choice for automotive fasteners, electrical components, and hardware

There are 20 barrels measuring approximately 22″ x 60″.
The tank ID sizes are 74” x 31” x 36” for single sizes.
List of tanks:
1pc 8 station tank
1pc 7 station tank
9pc single tank
2pc double tank
2pcs 2 tank counter flowing rinse
1pc 4 station counter flowing rinse
There are 3 rectifiers included.
Rectifier 1, 460 input, 9v output, 3 phase 60 herts, 225 amps in, 14,000 out
Rectifier 2, 460v 3phase 60 hertz, 9 volt 9,000 amp output
Rectifier 3, 460v 3phase 60 hertz, 24v 4,000 amp output

The tanks are mounted in 4 sections on steel tube skids.
Each section is approx 10ft wide x 30ft long. If you installed the entire line it would be 10ft x 120ft, but if you only did the zinc portion,
which was our plan, we think it would take about 10ft x 90ft.

• Output Voltage: Typically 6V to 12V for barrel lines. Higher voltage (up to 12V) is required to overcome the electrical resistance of the barrel mesh and bulk workload. 
• Control Mode: Constant Current (CC) and Constant Voltage (CV) modes with automatic crossover. CC mode is critical for maintaining the precise tin-to-zinc alloy ratio. 
• Ripple Factor: < 3% RMS at full rated output. Low ripple prevents uneven alloy distribution and ensures a bright, consistent finish. 
• Regulation Accuracy: ±1% or better to prevent shifts in the deposition rates of the two different metals.
• Cooling Options: Air-cooled (forced air with anti-corrosion coating) or Water-cooled (ideal for harsh, corrosive plating shop environments).
• Control Interface: RS485, Modbus, or 4-20mA/0-10V analog inputs for PLC integration and automated recipe management. 

• Barrel Design: Heavy-duty polypropylene barrels with optimized perforation sizes to maximize solution transfer while retaining small parts.
• Anodes: Soluble tin-zinc alloy anodes (matching the target deposit ratio) or separate tin and zinc anodes with split-circuit rectifier controls to prevent anode polarization.
• Chemistry Control: Automatic dosing systems for brighteners, stabilizers, and pH adjusters (alkaline or neutral chemistries are most common).
• Cathode Contacts: Danglers or center-rod contacts designed for high current distribution within the tumbling part mass.

• Pre-Activation: A mild acid dip (typically 0.5–1% nitric or sulfuric acid) to clear surface oxides before passivation.
• Passivation Type: Trivalent chromium (Cr³⁺) formulations to comply with RoHS and REACH environmental regulations.
• Film Variations: Clear/blue-bright or iridescent yellow/thick-film passivates depending on salt-spray requirements.
• Sealants/Topcoats: Often integrated into the post-chromate rinse stations to enhance friction control (torque-tension properties) and boost corrosion resistance beyond 1,000 hours of salt spray testing