Precision Chemical Delivery for Surface Finishing · Reliable Power for Coating and Electroplating Processes-Meibao Pump | China's Largest Corrosion-Resistant Pump Manufacturer

Why Electroplating/Surface Treatment

Precision Chemical Delivery for Surface Finishing · Reliable Power for Coating and Electroplating Processes

The surface finishing industry—including electroplating, anodizing, electroless plating, phosphating, passivation, and coating—requires stable flow, precise chemical control, and excellent corrosion resistance.

For hard chromium plating, Meibao MB-F centrifugal pumps, MB-MD magnetic drive pumps, MV-S sump pumps, and MB-D metering pumps support bath circulation, filtration, and chemical replenishment. With PFA/PTFE linings or titanium/duplex stainless steel components, they provide reliable performance in highly corrosive chemicals and help reduce bath contamination and coating defects.

In aluminum anodizing, stable circulation and accurate dosing are essential for consistent oxide films and dyeing quality. At a South China aluminum extrusion facility, MB-MD pumps across 12 anodizing lines improved film uniformity from ±14% to ±5.5%, increased first-pass dyeing yield from 82% to 96%, and reduced dye consumption by 18%, saving over USD 110,000 annually. MB-D metering pumps provide ±0.5% dosing accuracy to maintain stable bath concentrations.
For phosphating, passivation, silane treatment, and paint shop circulation, liquids may contain abrasive particles, sludge, or high-viscosity solids. Meibao MV-S and MB-F pumps feature wear-resistant and anti-clogging designs for demanding conditions. In three automotive paint lines in East China, MB-F open-impeller pumps operated for 18 months with zero clogging incidents.

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The Challenge

Semiconductor wet processes tolerate zero compromise

HF acid attacks metals, metal ions kill wafer yield, CMP slurry destroys seals, and ultra-pure water demands zero particle shedding. Conventional pumps fail on all four fronts.

Bath Impurity Contamination & Coating Defects

Metal impurities such as Fe, Cu, Zn, and Pb exceeding 10 ppm can cause pitting, brittleness, and poor adhesion, with contamination-related defect rates reaching 8%–15%. Conventional 316L stainless steel pumps may leach Fe ions at 0.5–2.0 mg/(L·day) in acidic plating solutions, adding up to 150–600 mg of Fe per month to a 10,000 L bath and increasing purification frequency and operating costs.

Abrasion & Clogging from Solids-Laden Liquids

Phosphating sludge, anodizing mud, and paint booth solids (2%–8% concentration, 5–500 μm particles) can cause severe erosion and clogging. Conventional pump impellers in 4% solids phosphating solutions typically last only 4,000–6,000 hours, requiring 2–3 replacements per year. Unexpected clogging and maintenance can also lead to significant production downtime and losses.

Inaccurate Dosing & Process Instability

In electroplating and anodizing, dosing deviations above ±3% can affect coating quality. Conventional metering pumps may experience accuracy drift under changing backpressure, while check valve wear can reduce repeatability to ±5%–±8%, increasing additive waste and wastewater COD loads. In hard chromium plating, catalyst dosing deviations above ±5% can reduce coating hardness and increase scrap rates to 15%–30%.

Meibao Solutions

Fluoroplastic Lining, Hydraulic Optimization, and Zero-Leakage Magnetic Drive

Meibao applies three core solutions against corrosion, abrasion, and emissions. MB-F Series uses 6.0 mm FEP/PFA fluoroplastic lining with Hastelloy C-276 shaft sleeves—only 0.02 mm/year corrosion at 80,000 ppm Cl⁻ and 65°C. MV-S Series optimizes impeller hydraulics with duplex stainless steel CD4MCu, extending MTBF to 18,500 hours in gypsum slurry. MB-MD Series adopts a fully sealed magnetic drive, achieving 0.000% leakage and ≥99.7% emission reduction for H₂S and VOC service.

Ultra-Pure Fluoropolymer Flow Path · Zero Metal Leaching

MB-F and MB-MD Series wetted parts use high-purity PFA or PTFE (6.0–8.0 mm thick), with a 24-hour UPW rinse and ICP-MS verification. Metal ion leaching is controlled below 0.05 ppb for 12 target elements, including Fe, Cu, Zn, Pb, and Ni. Kalrez® 6375 seals and magnetic or dual mechanical sealing provide reliable, contamination-free operation at up to 80°C and pH 0.5, helping prevent pitting, embrittlement, and coating defects.

Open Impeller + Wear-Resistant Anti-Abrasion Design

MV-S vertical sump pumps and MB-F Series pumps are designed for solids-laden liquids, featuring open or semi-open impellers, 8–15 mm vane clearance, and solids passage up to 15 mm. CD4MCu duplex stainless steel or high-chromium cast iron options provide excellent wear resistance. After 15,000 hours of continuous testing in 6% solids phosphating solution, impeller wear remained below 1.2 mm, delivering an MTBF of up to 18,000 hours.

High-Precision Closed-Loop Metering · ±0.3% Accuracy

MB-D metering pumps combine VFD control, closed-loop stroke feedback, and pulsation damping to maintain dosing accuracy within ±0.3%, even under backpressure fluctuations. PTFE composite dual diaphragms and ceramic check valves provide reliable long-term operation. Bath concentration fluctuations were reduced from ±5% to ±1.2%, cutting additive consumption by 18%–25% and reducing plating thickness COV from over 8% to below 3%, with product yield reaching ≥97%.

Product Range

Recommended Pumps for
Electroplating/Surface Treatment

Each pump model is available in multiple material configurations to match the exact chemical and thermal requirements of your process.

Stainless Steel Vertical Pump

96 m³/h Max Flow 39 m Max Head 0.37-11.19kW Power -Max Temp -Max Pressure -Warranty

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Out-of-Tank Vertical Chemical Pump

110 m³/h Max Flow 36 m Max Head 0.75-22.371kW Power -Max Temp -Max Pressure -Warranty

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Vortex chemical centrifugal pump

230 m³/h Max Flow 48m Max Head 11-22kW Power 90 °CMax Temp 4.8 kgMax Pressure -Warranty

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Fluorine lined centrifugal pump

300m³/h Max Flow 55m Max Head 0.75-22.4kW Power 110°CMax Temp -Max Pressure 3 yearsWarranty

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Wastewater & Exhaust Gas Treatment Vietnam

Anti-Clogging Self-Priming Pump for Wastewater Lifting: 380 L/min Stable Flow, 0 Leakage, Annual Savings

The Problem

Vinh Hao Industrial Wastewater Treatment Station is located in an industrial park in Vietnam. It is responsible for treating industrial wastewater from several factories in the park. One of the key processes is the wastewater lifting system, which transfers industrial wastewater collected in the equalization tank to the downstream biological treatment units.

Our Solution

The customer's three main problems—clogging, leakage, and self-priming failure—were closely connected:

• To prevent clogging, the impeller needs wide flow passages that can handle solid particles.

• To prevent leakage, the traditional shaft seal needs to be removed.

• To ensure reliable self-priming, the pump needs strong air-water separation and self-priming capability.

The Result

Since installation and commissioning were completed in December 2025, the 8 MA-50032L self-priming pumps at Vinh Hao Wastewater Treatment Station have operated continuously for more than 8 months.

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Technical Consultation

Need Help Selecting the Right Pump for Your Process?

Our industry application engineers have direct process experience. Share your process data sheet and we'll provide a detailed pump recommendation with material selection, model number, and expected performance curve — typically within 48 hours.

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Response Time

48-Hour Technical Reply

Expert Engineers

Direct Process Experience

Documentation

Performance Curves & PDS Included

Sample Lead Time

4-6 Weeks Standard

Electroplating/Surface Treatment