Removal of Corrosion Resistant Polymeric Coatings from Metal Cans

Non-destructive method and system for removing the polymeric coating from metallic food cans

The Need

Corrosion-resistant polymeric coatings are widely used in metal cans, providing an effective barrier against gases, light, and microorganisms. However, between the canning process and foodstuff properties, corrosion can still occur despite ongoing research to further improve corrosion-resistant packaging. Part of the challenge lies in a reliable method of removing these coatings without altering their properties at the time of analysis in order to better understand how the protective coatings are performing against corrosion.

The Technology

Our technology is an electrochemical removal of corrosion-resistant polymeric coatings from metal cans. It involves an innovative electrochemical cell with an electrolyte solution enclosed in a non-conductive vessel. By applying a carefully controlled current to the metallic surface of the food container, the technology efficiently and precisely delaminates the polymeric coating without affecting its chemical composition.

Benefits and Advantages:

  • Accurate Coating Analysis: Precise and reliable analysis of the delaminated polymeric layer allows for critical insights into the coating's performance and chemical composition.
  • Non-Destructive Testing: This non-destructive method ensuring the properties of the coating at the time of sample collection remain unaltered for analysis.
  • Improved Research and Development: Facilitating the exploration and development of new, enhanced corrosion resistant coatings for food packaging this technology will lead the way to:
    • Longer product shelf life: more robust corrosion resistance will lead to improved packaging materials and longer shelf life.
    • Quality Control & Assurance: A non-destructive method to evaluate the integrity of protective coatings on metal cans offers another way to ensure regulatory compliance and food safety standards.
    • Cost-Efficiency: With the development of improved corrosion protection and quality control, food manufacturers can reduce packaging waste and expenses related to spoilage or corrosion-related issues.

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