Metal finishing and steel processing

Acid-resistant pumps for the steel and surface treatment industry

Engineered to safely transfer highly corrosive pickling baths, concentrated acids, and
aggressive electroplating chemicals in heavy-duty metal finishing facilities.

Heavy-duty metal processing

Reliable fluid transfer for aggressive pickling lines

The steel industry and surface treatment facilities operate under incredibly harsh conditions. Metal finishing processes, such as continuous steel pickling and electroplating, rely on boiling mixtures of hydrochloric, sulfuric, and hydrofluoric acids. Handling these extremely corrosive baths requires specialized pumping equipment that can withstand severe chemical attack and high temperatures without degrading, preventing dangerous and costly plant shutdowns.

Tecnium Pumps delivers heavy-duty thermoplastic solutions engineered specifically for these brutal metallurgical environments. By manufacturing our casings from massive solid-block polymers like PP, PVDF, and E-CTFE, our units offer absolute resistance to concentrated acids, ensuring maximum operational safety and allowing your metal finishing lines to run continuously without the threat of catastrophic equipment failure.

Steel industry
Steel Industry

Engineered for metallurgy

Core advantages for surface treatment facilities

  • Immunity to concentrated acids: Solid plastic construction easily handles aggressive chemical baths, including hot sulfuric and hydrochloric acids, without suffering structural degradation.

  • Safe electroplating operations: Advanced leak-free sealing architectures ensure absolute containment of hazardous surface treatment chemicals, protecting plant personnel and adjacent metallic infrastructure.

  • High-temperature endurance: Selected thermoplastic materials like PVDF and E-CTFE maintain exceptional mechanical strength even when transferring scalding hot metal cleaning solutions.

  • Continuous line reliability: Heavy-duty external armors and oversized shafts absorb extreme mechanical stress, guaranteeing uninterrupted production in demanding continuous steel pickling facilities.

Heavy-duty metallurgical equipment

Recommended pumping solutions for steel and surface treatment

Review our robust selection of acid-proof thermoplastic pumps, strictly engineered to survive the boiling temperatures, abrasive particles, and relentless chemical aggression of continuous metal finishing lines.

Essential for safely emptying hazardous chemical waste pits and acid collection tanks in steel plants. Designed with a heavy-duty cantilevered shaft, these units have no submerged bearings, allowing them to run dry without damage while handling acid mixtures laden with metallic scale.

The ultimate solution for circulating hot pickling liquids and electroplating baths. Featuring an advanced glandless architecture, these pumps completely eliminate mechanical seals, providing leak-free, dry-running capable operation even when transferring heavy, particle-rich acidic fluids.

Built for continuous, heavy-duty acid transfer in massive metallurgical processing plants. Manufactured to precise EN 22858 and ISO 5199 standards, these solid thermoplastic block pumps offer unmatched mechanical strength against the corrosive attack of boiling hydrochloric and sulfuric acids.

An economical and space-saving choice for auxiliary acid dosing and smaller surface treatment lines. The compact monobloc architecture delivers excellent hydraulic performance and chemical resistance without the need for complex coupling alignments in restricted plant areas.

Frequently asked questions about our pumps for steel and surface treatment

Continuous steel pickling operations utilize extremely hot baths of hydrochloric or sulfuric acid to remove scale and impurities from the metal surface. Standard metallic pumps fail rapidly in these highly corrosive, high-temperature environments, leading to costly line stoppages.

To combat this, we manufacture our liquid ends from advanced high-temperature thermoplastics such as PVDF and E-CTFE. These massive, solid-block polymers maintain exceptional mechanical integrity and chemical resistance even when submerged in scalding acid mixtures.

This specialized construction ensures that your pumping equipment can operate continuously at elevated temperatures without softening or degrading, providing reliable fluid transfer for your most demanding continuous pickling processes.

During the surface cleaning process, the acidic fluid quickly becomes contaminated with sharp, abrasive particles of iron oxide and metallic scale. When this laden fluid is pumped, it acts like a grinding paste, quickly destroying the mechanical seals and close-clearance hydraulics of conventional pumps.

Our vertical external pumps overcome this challenge by utilizing an innovative glandless architecture that completely removes mechanical seals from the wetted area. Combined with optimized open impeller designs, this allows the pump to easily pass heavy metallic solids.

This seal-less, open-clearance design ensures the pump can effortlessly circulate abrasive acid mixtures without suffering internal wear or clogging, drastically reducing maintenance interventions and extending the lifespan of your surface treatment equipment.

Electroplating and galvanizing facilities manage highly toxic chemical baths containing heavy metals, cyanides, and concentrated acids. Any accidental leakage from a pump not only poses a severe health risk to plant operators but can also cause catastrophic corrosion to the surrounding steel infrastructure.

For these critical safety applications, we strongly recommend our sealless magnetic drive technology or glandless vertical pumps. By eliminating the vulnerable dynamic mechanical seal, we remove the primary pathway for dangerous chemical spills.

This creates a completely leak-proof fluid containment system that guarantees operator safety, ensuring your facility strictly complies with environmental regulations while protecting adjacent metallic structures from acid fume degradation.

In heavy metallurgical plants, underground collection pits receive a constant, unpredictable flow of corrosive wash water, spent acids, and abrasive metallic sludge. Pumping out these sumps often results in accidental dry running when the liquid level drops, which instantly destroys standard submerged bearings.

Our vertical cantilever sump pumps are specifically engineered with a heavy-duty, oversized shaft that requires no bottom support bearings inside the corrosive waste fluid. The entire rotating assembly is supported from above the baseplate.

Because there are no rubbing components within the wetted section, these rugged units can run completely dry for extended periods without experiencing any thermal or mechanical damage, providing ultimate reliability for automated acid waste drainage systems.

Many industrial pumps attempt to combine the strength of metal with the chemical resistance of plastic by applying a thin fluoropolymer lining to a cast iron casing. However, in aggressive steel processing environments, the permeation of hot acid vapors or a single scratch from metallic scale can breach this thin layer, causing rapid, hidden corrosion of the metal shell.

By manufacturing our pump casings from thick, solid blocks of virgin thermoplastics, we eliminate the risk of lining delamination and sub-surface corrosion entirely. The material offers homogenous chemical resistance throughout its entire thickness.

This solid-block architecture delivers unmatched structural durability and long-term safety, ensuring that even under extreme mechanical stress and abrasive wear, the pump remains completely impervious to the aggressive chemicals used in metal finishing.

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