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ECL Cleaners for Cold Rolled Coils: Clean Strip Before Annealing

An ECL cleaner is a heavy duty alkaline degreasing chemical used on continuous electrolytic cleaning lines. As essential electrolytic cleaning line chemicals, they are designed to remove rolling oils, iron soaps, and carbonaceous smut from cold rolled steel strips before they enter the batch annealing furnace. Clean strips prevent residual oil from baking into permanent stains.

What is SUKLEEN Electro Cleaner?

SUKLEEN is a silicate based, phosphate enriched liquid electro cleaner manufactured by Sudha Speciality Chemicals. Formulated with sodium and potassium hydroxides, it functions effectively at both high and low current densities. It operates as a high-performance electrolytic degreasing cleaner for steel for both spray and dip pre-cleaning applications on continuous coil lines.

What Contaminants Does SUKLEEN Remove?

Cold rolled coils often reach the cleaning line coated in stubbornly adhered mill residues. SUKLEEN is engineered with sequestering, wetting, and dispersing agents to lift the following contaminants in a single alkaline stage:

  • ● Rolling oils and coolants carried over from the cold mill.
  • ● Black and brown patches on the strip surface.
  • ● Iron soaps and stubborn metallic smuts.
  • ● Carbonaceous dirt from cold rolled coils.

ECL Cleaners- Technical Specifications and Operating Parameters

To achieve a perfectly clean strip prior to batch annealing, plant operators must configure their mild steel tanks and heaters to the following operational parameters.

Parameter

Precleaning Stage

Electrocleaning Stage

Chemical Concentration

20 to 50 g/L

40 to 80 g/L

Working Temperature

65 to 75 degrees Celsius

70 to 80 degrees Celsius

Maximum Oil Load Tolerance

4.0 g/L

2.5 g/L

Polarity

Not Applicable

Anodic, Cathodic, or Bipolar

How to Make Up and Maintain the Cleaning Bath

For initial bath preparation, operators should add 30 to 80 kg of SUKLEEN liquid per 1000 liters of water. To maximize bath life and maintain line efficiency, follow these maintenance protocols:

  • ●  Foam Control: As the oil load increases, the bath will develop a foaming tendency. Use SUFOAM, a complementary silicone based defoamer, via an automatic dosing system to suppress foam.
  • ●  Analytical Control: Test bath concentration at least once or twice per shift using a simple titration method with 1.0(N) sulphuric acid and a phenolphthalein indicator.
  • ●  Discardal Limits: The bath features a high oil load tolerance. However, operators must discard or refresh the solution when oil loads exceed 4.0 g/L in the precleaning tank or 2.5 g/L in the electrocleaning tank.

Safe Handling, Packaging, and Effluent Disposal

SUKLEEN acts as a highly effective electrolytic cleaning solution for metal surface treatment, meaning it is strongly alkaline. Waste must be neutralized in an Effluent Treatment Plant (ETP) using pickling waste or mineral acids before the supernatant liquid is discharged according to local regulations. Operators must wear proper personal protective equipment, including aprons, rubber gloves, safety goggles, and boots. This industrial electrolytic cleaner chemical has a one year shelf life and is safely packaged in 260 kg HDPE barrels or 1250 kg IBC containers.

Why Should You Partner with Sudha Speciality Chemicals

A rejected steel coil represents a massive loss in time, energy, and revenue. In continuous electrolytic cleaning operations, choosing the right alkaline electrolytic cleaner for steel is your only defense against residual oil baking into permanent stains during batch annealing.

Sudha Speciality Chemicals Private Limited takes the guesswork out of surface preparation. Rather than supplying isolated products, our Kolkata based technical experts deliver a precisely matched ecosystem of high tolerance cleaners and specialized defoamers. We help steel mills entirely eliminate surface defects, drastically lower chemical consumption, and keep production lines running at peak profitability.

Stop compromising on your strip cleanliness and protect your final product quality. Connect with our industrial process experts today to upgrade your continuous cleaning line:

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