▼ Industry Background
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Surface treatment and electroplating are the “cosmetic specialists” of manufacturing—imparting corrosion resistance, wear resistance, decorative and functional surfaces to metal and plastic components. From zinc-nickel alloy plating of automotive parts, electroless nickel/gold plating of electronic connectors, hard anodizing of aerospace aluminum alloys, cathodic electrophoretic coating of car bodies, to phosphating and passivation of fasteners—every process step relies on the precise delivery and circulation of chemical agents. These processes share three major challenges: extreme corrosion from strong acids and alkalis (sulfuric acid, hydrochloric acid, nitric acid, sodium hydroxide); precise ppm-level replenishment of brighteners and additives; and complex operating conditions involving high temperatures, solid particles, and entrained bubbles. The following analyzes the core pain points and JONSN solutions.

▼ Industry Pain Points
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▎Plating Bath Circulation — Triple Wear from Strong Acids, High Temperature, and Solid Precipitates 
Nickel/chromium/zinc plating baths contain highly corrosive media such as sulfuric acid, hydrochloric acid, nickel sulfate, and copper sulfate at 40–60°C, carrying solid particles like anode sludge and additive decomposition products. Conventional centrifugal pump seals swell and deform in acidic media, achieving a service life of only 3–6 months; the metal isolation shells of ordinary magnetic drive pumps gradually thin and crack when penetrated by acidic liquids. Pump failure directly halts bath circulation, resulting in uneven bath temperature and inconsistent coating thickness.

▎Electroless Plating Replenishment — Metal Ion Concentration Decay; Replenishment Deviation Causes Uncontrolled Plating Rate
In processes such as electroless nickel plating, electroless copper plating, and immersion gold, metal ions are continuously consumed as the coating is deposited. Replenishment solutions are typically injected online as concentrates at flow rates of 10–500 ml/min. Conventional metering pumps suffer cavitation in acidic concentrates, causing actual replenishment deviations exceeding ±5%. Insufficient replenishment reduces plating rates by 20%–30%, while over-replenishment wastes expensive metal salts (nickel sulfate ¥60–80/kg, chloroauric acid ¥400+/g).

▎Anodizing — Sulfuric Acid Bath Circulation + Organic Acid Sealing Agent Injection Requires Enhanced Resistance
Hard anodizing uses 15%–20% sulfuric acid solution at operating temperatures of −5°C to 5°C (hard anodizing) or 20°C (conventional anodizing). Sulfuric acid viscosity increases at low temperatures and is extremely corrosive to ordinary metal pump bodies. Sealing treatment also requires precise injection of organic acid/organic acid salt sealing agents. Insufficient pump corrosion resistance leads to metal ion dissolution contaminating the bath, affecting oxide film transparency and hardness.

▎Electrophoretic Paint Delivery — High Viscosity, Prone to Settling. No Entrained Bubbles Allowed
Cathodic/anodic electrophoretic paint has viscosities as high as 1,000–3,000 mPa·s, containing epoxy resins, polyurethanes, and pigment fillers, prone to sedimentation and stratification. The system requires continuous circulation to prevent sedimentation and maintain uniform concentration. Conventional progressive cavity pump stators swell from paint solvents (xylene, ketones), and screw agitation generates entrained bubbles causing coating defects (pinholes/craters). A single automotive body coating line shutdown due to electrophoretic paint delivery pump failure results in losses of tens of thousands of yuan per hour.

▎Phosphating and Passivation — Acid-Alkali Cycling, Sediment Control, Temperature Sensitivity
Zinc-based/aluminum-based phosphating processes involve multiple acid-alkali treatment steps: degreasing → rinsing → surface conditioning → phosphating → passivation → sealing. Each step's chemical agents require precise metered addition, and phosphating solutions containing phosphoric acid, nitric acid, and Zn/Ni/Mn basic phosphates readily produce precipitates. Ordinary stainless steel pumps suffer crevice corrosion in mixed nitric-phosphoric acid systems, resulting in short service life. With phosphating solution temperature controlled at 35–55°C, pump operational stability directly affects phosphate coating weight and corrosion performance.

▎Pickling — Extreme Corrosion from Concentrated HCl/H₂SO₄/HNO₃ + HF Mixed Acids
The chemical agents used in metal pretreatment pickling processes are extremely aggressive: hydrochloric acid (30%–37%) for rust removal, sulfuric acid (98%) for oil removal, nitric acid + hydrofluoric acid mixed acids for scale removal/polishing. Ordinary metal pump bodies suffer pitting + stress corrosion cracking in concentrated hydrochloric acid, potentially lasting only 2–4 months. Pickling pump failure stops the entire pretreatment line, bringing all downstream plating/coating to a halt.

▎Brightener Replenishment — ppm-Level Accuracy Directly Determines Coating Gloss and Cost
Electroplating brighteners (compositions: thiourea, alkyne amines, alkyne ethers, surfactants) exist in the plating bath at ppm-level concentrations with consumption rates of 50–300 ml/kAh. Conventional timed replenishment relies on ampere-hour empirical estimation, with actual replenishment deviations potentially reaching ±20%–30%. Under-replenishment leads to dull, rough coatings with degraded gloss; over-replenishment wastes expensive chemicals (brighteners ¥80–200/kg), and excess decomposition products accumulate and contaminate the bath, shortening bath life.

▼ JONSN Solution: Seven Processes — Corrosion Resistance, High Precision, Multi-Condition Trifecta
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▎ Plating Bath Circulation — MRA/MRB Corrosion-Resistant, Wear-Resistant, Continuous Duty
MRA (100–2000 ml/min) and MRB (400–4800 ml/min) series deliver a fully corrosion-resistant, long-life solution for plating bath circulation:

· 316L stainless steel pump head withstands full corrosion from plating bath media including sulfuric acid, hydrochloric acid, nickel sulfate, and copper sulfate
· Hastelloy C-276 pump head option for extreme corrosion scenarios involving nitric acid/hydrofluoric acid mixed acids
· Positive displacement principle ensures constant circulation flow without drift due to bath viscosity/temperature fluctuations
· Magnetic drive eliminates dynamic seals, preventing environmental incidents and personal injury from acid leakage
· Large gear clearance design accommodates solid particles such as anode sludge without jamming or scoring
· Design life >20,000 hours, matching the long-cycle continuous operation demands of plating lines

Recommended: MRB Series (400–4800 ml/min) for large bath circulation, MRA Series (100–2000 ml/min) for small bath circulation, Hastelloy C-276 optional

▎Electroless Plating Replenishment — MPG ppm-Level Metal Ion Online Replenishment
MPG Series (40 μl/r, 1–280 ml/min) achieves precise online injection of electroless plating replenishment solutions with microliter-level metering accuracy:

· Nickel sulfate/copper sulfate/potassium chloroaurate concentrate replenishment flow 10–500 ml/min, metering deviation <±1%
· Online monitoring of bath metal ion concentration via photoelectric sensor, MPG real-time proportional tracking replenishment
· Positive displacement viscosity immunity: replenishment solution viscosity changes do not affect replenishment volume
· 316L/PEEK flow path fully inert to acidic metal salt solutions, zero metal ion dissolution contamination
· Multiple metal salts independently pumped per channel, one-touch formula switching with zero cross-contamination

Recommended: MPG Series (40 μl/r) × N channels, photoelectric online feedback closed-loop control

▎Anodizing Circulation + Sealing Agent Injection — MRA + MPG Dual Precision
MRA Series main circulation + MPG Series sealing agent injection, providing a complete solution for anodizing:

· MRA (100–2000 ml/min) main circulation: resistant to 15%–20% sulfuric acid, operating temperature −5°C to 20°C, non-stop continuous operation
· Magnetic drive eliminates dynamic seals, zero risk of sulfuric acid leakage
· MPG (1–280 ml/min) sealing agent injection: precise addition of organic acid/organic acid salt sealing agents, controlling sealing quality
· 316L pump head provides good sulfuric acid resistance, maintaining stable operation even under hard anodizing low-temperature conditions
· Configurable cooling jacket to assist in maintaining the bath at low-temperature process windows

Recommended: MRA Series main circulation + MPG Series sealing agent, 316L pump head

▎Electrophoretic Paint Delivery Circulation — DP High Viscosity, Low Shear, Solvent Resistant
DP Series (0.2–100 cc/r) designed for the high-viscosity, sedimentation-prone, solvent-containing characteristics of electrophoretic paint:

· Capable of delivering viscosities up to 50,000 mPa·s, fully covering the entire viscosity range of cathodic/anodic electrophoretic paints
· Low-shear design: paint generates no entrained bubbles, coatings free of pinhole/crater defects
· Large flow channel structure prevents sedimentation clogging from filler particles in the paint
· PTFE/PEEK wetted flow path seals resistant to paint solvents including xylene, ketones, and ethers
· Magnetic drive eliminates dynamic seals, zero solvent vapor emission from the system
· Configurable jacketed insulation to meet electrophoretic paint bath constant temperature requirements of 28–32°C

Recommended: DP Series (0.2–100 cc/r), PTFE seals, magnetic drive zero leakage

▎Phosphating/Passivation Chemical Precision Metering — MRA Phosphoric/Nitric Mixed Acid Solution
MRA Series (100–2000 ml/min) provides precise metering and corrosion resistance guarantees for multi-step phosphating and passivation processes:

· Hastelloy C-276 pump head simultaneously withstands mixed acid corrosion from phosphoric acid, nitric acid, and basic phosphates
· Positive displacement metering ensures precise addition of surface conditioners, phosphating agents, passivators, and sealers independently, with deviation <±1%
· Magnetic drive eliminates dynamic seals, preventing nitric/phosphoric mixed acid leakage
· Configurable multi-channel independent pumping: degreaser, surface conditioner, phosphating agent, passivator, sealer—all managed through a single control cabinet
· 316L pump head also suitable for well-controlled phosphating sedimentation applications, offering better cost-effectiveness

Recommended: MRA Series (100–2000 ml/min) × N channels, Hastelloy C-276 or 316L pump head

▎Pickling Chemical Precision Delivery — MRA Hastelloy Extreme Corrosion Solution
MRA Series tackles the most severe challenges of pickling processes with Hastelloy extreme corrosion resistance:

· Hastelloy C-276 pump head simultaneously withstands comprehensive corrosion from hydrochloric acid (37%), sulfuric acid (98%), and nitric acid + hydrofluoric acid mixed acids
· Positive displacement metering ensures constant pickling solution delivery volume without drift due to acid concentration or temperature fluctuations
· Magnetic drive eliminates dynamic seals, preventing concentrated acid leakage and personal injury incidents
· PTFE/PEEK seals chemically inert to concentrated hydrochloric acid, concentrated sulfuric acid, and hydrofluoric acid—no swelling, no embrittlement
· Configurable flowmeter feedback closed-loop for precise quantitative addition of pickling solutions

Recommended: MRA Series (100–2000 ml/min), Hastelloy C-276 pump head, magnetic seal

▎Brightener Precision Replenishment — MPG Microliter-Level Online Continuous Injection
MPG Series (40 μl/r, 1–280 ml/min) fundamentally transforms brightener replenishment with microliter-level metering accuracy:

· Upgrades from “ampere-hour timed replenishment” to “ampere-hour online continuous replenishment,” reducing concentration fluctuation from ±20%–30% to <±5%
· Brightener intermediates such as thiourea/alkyne amines/alkyne ethers/surfactants independently pumped per channel, with flexible and adjustable formulations
· Low-shear delivery ensures brightener molecules are not mechanically degraded
· Linkable with electroplating ammeters for automatic replenishment calculation based on Ah × consumption coefficient, enabling intelligent control
· Achieves 15%–20% annual brightener cost savings while improving coating gloss consistency

Recommended: MPG Series (40 μl/r) × N channels, ampere-hour linked control, online continuous replenishment

▼ Product Selection Quick Reference

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▼ Corrosion Resistance and Environmental Compatibility

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· 316L/Hastelloy C-276/Titanium pump head options covering all scenarios from conventional pickling to extreme mixed acid corrosion

· Full-series magnetic drive eliminates dynamic seals, preventing acid/alkali/solvent/toxic plating solution leakage—meeting both environmental and occupational health requirements

· PTFE/FFKM/PEEK wetted flow path seals resistant to HCl, H₂SO₄, HNO₃, HF, solvents, oxidizers, and all classes of chemical agents

· ATEX/IECEx explosion-proof certification available for combustible solvent vapor environments in electroplating workshops

· NAMUR sensor interface available, compatible with plating line PLC/DCS control systems

· Minimal dead volume (<1 ml), small flush volume when switching products, zero residual cross-contamination

· Design life >20,000 hours, matching the long-cycle continuous operation demands of plating lines

· Operating temperature range −20°C to 260°C, covering the full temperature range from hard anodizing low temperature to high-temperature phosphating

▼ Core Values
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▸ Full Corrosion Protection — From Hydrochloric Acid to Mixed Acids, One Pump Handles the Entire Plating Line

The chemical agents used in the surface treatment industry are among the most aggressive in industrial applications: hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid, and mixed acid systems. Ordinary metal pumps need replacement every 3–6 months. JONSN provides 316L/Hastelloy C-276/Titanium three-tier corrosion protection with a design life exceeding 20,000 hours—one pump accompanying the entire plating line through its long-cycle operation.

▸ Intelligent Brightener Replenishment — Ah-Linked Control Saves 15%–20% on Chemicals, Brighter Coatings

Brighteners constitute a significant portion of electroplating costs and directly determine product appearance grade. MPG microliter-level metering + Ah-linked control compresses replenishment deviation from the ±20%–30% of conventional timed methods to <±5%, saving 15%–20% on annual brightener costs while eliminating dull and rough coatings caused by insufficient replenishment.

▸ Zero-Bubble Electrophoretic Paint Delivery — DP Low Shear Delivers Defect-Free Coatings

Automotive body electrophoretic paint coating quality directly determines the vehicle's corrosion resistance lifetime. The DP Series low-shear design fundamentally eliminates bubble entrainment caused by progressive cavity pump agitation—coatings are free of pinholes and craters, with salt spray test life improved by 20%–30%.

▸ Electroless Plating Replenishment from “Empirical Estimation” to “Online Precision”—Saving Tens of Thousands in Metal Salt Costs Annually

Electroless nickel/copper/gold metal salts are expensive, with chloroauric acid reaching over ¥400/g. MPG + photoelectric online feedback controls replenishment deviation within ±1%, neither wasting precious metals nor causing plating rate decline and production loss from insufficient replenishment.

▸ Magnetic Seal Zero Leakage — Fundamentally Eliminates Acid/Alkali Injury and Environmental Incidents

Pickling, plating, and anodizing processes in electroplating workshops involve large quantities of concentrated acids, toxic chemicals, and flammable solvents. The significance of JONSN's full-series magnetic drive without dynamic seals extends beyond saving seal replacement costs—it fundamentally eliminates potential risks of personal injury and environmental incidents at the design source.

▸ Plating Bath Circulation — Large Tooth Clearance + Nitrided Hardened Gears, Anode Sludge No Longer a Problem

Anode sludge and additive decomposition products carried in plating solutions are the primary cause of circulation pump wear. The MRB/MRA large tooth clearance design + optional nitrided hardened gears with hardness HV 1000+ accommodates trace solid particles without scoring tooth surfaces, with a design life exceeding 20,000 hours.