Electrolytic Cleaning Lines


The electrolytic cleaning lines (ECL) supplied by Primetals Technologies enable to remove the remaining iron fines and oil residues from the tandem mill.

Advanced ECL technology provides outstanding coils cleanliness before the coils reach the downstream batch annealing furnace to obtain perfect surface cleanliness. This type of line could also be used as coil buildup line. Modules such as payoff reel, shear, welder, cleaning section, etc. are common with galvanizing lines.


  • Welder
  • Cleaning section

Main Benefits

  • Improved technology of different cleaning section design (spray, “V” shape and electrolytic, vertical tank and electrolytic)
  •  A “cleaning solution” is supplied, not just a cleaning section
  •  Cleaning design for fast and efficient strip cleaning
  •  Fully automated line presetting and program change for increased yield and throughput capacity
  •  Integrated environmental solutions
  •  Optimization of utilities consumption

Primetals Technologies has developed and implemented the best technologies of cleaning (immersion, type of brushes, type for electrolysis, rinsing) in terms of:

  • Investments costs
  • Operating cost 
  • Environmental impact
  • Design optimized to suit application
  • Easy maintenance and operation due to ideal equipment design


Primetals Technologies has vast experience in upgrading and modernization of processing lines. With a systematic approach, we work closely with our customers to develop a tailored modernization concept based on their individual needs taking all boundary conditions fully into account. The solution may be purely electrical, automated, mechanical or a combination. Based on the selected concept, the modernization can be carried out in several steps or during a plant shutdown. Primetals Technologies’ experience minimizes downtimes and ensures a fast start-up and top quality.

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    • Fig.1- Cleaning section
    • Fig.2- Tank detail of a cleaning line


For Electrolytic Cleaning Lines, Primetals Technologies offers the state of the art MashLap welding machine ranging from 0.1 to 3.5 mm offering a great service for money for your processing line.  With their real-time feedback of the welding quality with quality control systems and our innovative condition monitoring system detecting deviations from the normal state conditions to enable preventive maintenance measures, Primetals Technologies offers you fully automatic welding machines requiring no operator assistance, with an increased welder reliability (over 99 %). The user-friendly HMI enables an easy operation and the  easy access to the components enables an easy maintenance with long service life.

Vertical or Horizontal Electrolytic Cleaning section

Strip cleanliness is essential in the coating process to allow a good layer adhesion onto the strip surface. Oil and fines are removed thanks to adequate cleaning definition in association with process technology. Primetals Technologies has optimized cleaning section technology according to the incoming strip and coated products. Thanks to the improved technology of different cleaning section designs (spray, “V” shape and electrolytic, vertical tank and electrolytic), our electrolytic cleaning section help you optimize the consumption of utilities and reduce waste.


The perfect tool to guarantee you a defect-free surface condition of the processed steel strip. SIAS will detect and identify critical defects, for deep-drawing applications such as fine slivers, holes or scratches, as well as coating defects. The tiniest defects such as arc spots, may be detected even at maximum speed. SIAS® picks up all major surface defects early in pickling lines before the value adding processes. It provides warnings on pickling issues. A result of SIAS® is that the pickling speed can be optimized. On coupled pickling line-tandem mills, additional benefits can be expected from an early detection of defects right before cold rolling: the potentially harmful defects are reported to the mill operator who can take action (slow down or open stands), eliminating defects-induced strip breaks. 

Inspection speeds are ranged easily up to 1,200 mpm for hot mill applications.

All above are made possible thanks to the most advanced technology available in the market - line scan cameras, Prewitt based convolution filters for detection and Coulomb hypersphere classification algorithms.

Complete process control at every level

The efficient and uninterrupted production of high-quality value-added products in strip-processing lines can only be assured by the application of advanced automation and process-control systems. This is particularly true for seamlessly linked processing lines where the varying speeds of the individual plant facilities have to be optimized to ensure best product quality and maximum output.

Our portfolio of solutions includes the following systems and models

  • The Pickling Optimizer for uniform pickling
  • The Automatic Strip-Quality Detection System to gather and classify all quality data
  • The Steel Quality Manager to document quality of discrete strip segments
  • Adaptive Elongation Control to achieve closest elongation tolerances
  • DynaWipe for fully automatic zinc thickness control
  • Closed-Loop Galvannealing Process Control to control the iron content in galvannealed coatings
  • And Fully Automatic Pickling Liquor Analysis and Control to ensure optimal pickling results


  • Reproducible and consistently high product quality
  • Higher product yields and output
  • Full transparency of all process and quality-relevant data
  • Reduced maintenance with automatic diagnostic systems
  • Process simulation and thorough pretesting of entire automation system
  • Fast line start-up  

Lifecycle Services — improve performance while reducing costs

Service and support from a single source — fast, experienced, reliable

As your lifecycle partner, we provide you with comprehensive operational support, which helps you operate your ironmaking, steelmaking, rolling and processing facilities at the lowest cost possible. Our portfolio includes maintenance and repair services as well as the fast delivery of original manufacturer components, produced in-house according to the highest standards of quality.

We fully integrate maintenance organizations into our customers’ organizations, thereby proving what it means to be a true lifecycle partner. The result of this win-win relationship between steel plant operators and Primetals Technologies is continuous improvement in equipment performance, product quality and total cost of ownership. 

Our customers can rely on fast and uncomplicated support in case of an unexpected component breakdown, wherever their facility may be located. Backed by global resources and a worldwide supplier chain, we can promptly provide you with top-quality original spare and wear parts at competitive prices. We keep a range of key parts on stock to ensure their fast availability.

Want to know more? Go to Primetals Technologies Lifecycle Services Site

Integrated Plants & Solutions for electrolytic cleaning lines — Experience that Matters

Please follow the corresponding links to learn more about our competences:

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​Reference Story: Full process turnkey processing line high technology

Steel Authority of India (SAIL), Bokaro, India

Type of plant
Electrolytic strip cleaning line within Cold Rolling Mill

Our solution
Electrolytic cleaning line from Primetals Technologies is an efficient solution for strip cleanliness by removing iron fines and oil film from the surface. Our electrolytic solution is a must to achieve optimum performance.

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