MetPro offers the most comprehensive industrial packaging solutions all under one roof!

Liquid Product Range Provides Rust Prevention

Are you wondering how corrosion occurs?

Is a step in your manufacturing process leaving residue?

Are you experiencing issues with your packaging process?

Why use supply cleaners (washing liquids) and preventive coatings?

Most corrosion cases are caused by deposits from previous manufacturing processes – residues of washing liquids, metalworking fluids, dust, acid or base activators or passivators during different coating types or deposits of acid gases during the process.

Rust Prevention

Typical production cycle: 

Incoming material  metalworking fluid  washing liquid  VCI packaging  transportation  unpacking  corrosion observation

Customers always look for an issue in their packaging (“it was packed in VCI, so why should it be corroded?”). The real source of corrosion happens before packaging, usually in the washing line, caused by poor maintenance, different materials being washed or simply by the wrong choice of product.

Fluids used during the manufacturing process can be basically split into 3 main groups:


  • Drilling
  • Milling
  • Sawing
  • Tapping
  • Cutting
  • Grinding


  • Washing step
  • Rinsing step

Protective (optional)

  • Passivation
  • Protective coatings
  • Barriers 
Rust Prevention

For each group, we have a selected line of products that can be used for specific operations according your requirements. While protective liquids are optional for rust prevention, cleaners should always be used.

For the liquids in your production line to be compatible with and to increase the effect of VCI film, we recommend starting backwards. The main influence on your corrosive environment is always the last treatment in the chain. Include protective liquids in your multi chamber washing machines, where cleaner can be used during rinsing, and protective coatings for rust prevention can be applied.

Rust Prevention

To keep the risk of any corrosion potential as low as possible, it’s critical to maintain all liquids used in your manufacturing process. This can be done in several ways, from basic field checks with a refractometer to simple corrosion testing based on DIN 51360 (cast iron chip test), and laboratory testing of samples from machines. 

During production, there’s always a loss of water based fluids, partly caused by drag-out (usually about 10%) but mainly due to evaporation (usually about 90%). This evaporation however means all residues and contamination from previous processes stays in, while only the water evaporates. Simply pouring the missing water and adding more concentrate is systematically increasing the amount of contamination. Therefore, the whole machine must be cleaned and fresh mixture added occasionally. This moment is based on many elements such as experience, severity of production, contamination during the previous process, etc. and should be always determined by a specialist.

Best Solutions for Rust Prevention

Our Corrorange of liquids provide optimum rust removal solutions for your needs. The 3-level fluid system of oil free and consequently water-soluble concentrates works with different processes and ensures safe rust inhibition during all stages of metal treatment – from processing through cleaning and storage, covering the entire operation. All products work synergistically, enhancing corrosion prevention from initial processing to final VCI packaging.

A complete solution of compatible liquids, high tech VCI and high quality packaging gives the best results in a corrosion protective plan.

Tested & Proven Rust Prevention That Works!

With over 70 years of experience in the field, our approach to customer satisfaction is achieved by clearly understanding your needs, so that we can offer the most suitable and cost-effective solution to you! Imagine having more protection to make sure your product stays safe, lasts longer, and makes it to your customer in the right condition.

Take the First Step: Get Started Now!

Contact MetPro today for a brochure and samples of our full range of our rust prevention products by filling out our form, or give us a call at 517-586-0011. We’ll be more than happy to work with you and figure out the best protection for your products. Contact us today for a free consultation!



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