EN 2828:1993

Overview

EN 2828:1993 is a European standard developed by CEN that establishes a precise method for testing the adhesion of metallic coatings used in aerospace applications. It focuses on the adhesion test for metallic coatings by burnishing, a mechanical process used to assess the durability and bonding quality of thin metal layers applied onto ductile substrates. This standard is integral for ensuring the reliability and longevity of coatings such as cadmium, copper, or silver, which have specific hardness and thickness requirements.

The test method specified in EN 2828:1993 is suited for coatings with a hardness below 250 HV (Vickers hardness) and thickness not exceeding 40 micrometres. It applies primarily in aerospace industries but is valuable wherever the adhesion of metallic coatings must be assured and referenced for quality control purposes.

Key Topics

• Adhesion testing by burnishing: A mechanical test where coatings are subjected to localized pressure to evaluate their adhesion quality.
• Applicable coatings: Metallic layers composed of ductile metals such as cadmium, copper, and silver.
• Hardness limit: Coatings should have a Vickers hardness (HV) of less than 250 to qualify for this testing method.
• Thickness limit: Coating thickness must be less than or equal to 40 micrometres.
• Test objectives: To determine the bonding strength and adhesion reliability of metallic coatings under specified conditions.
• Standard applicability: Widely used within aerospace industries and recommended for referencing when validating coating adhesion.

Applications

The EN 2828:1993 adhesion test by burnishing is primarily employed in the following domains:

• Aerospace manufacturing and maintenance: Ensures that protective metallic coatings on aircraft components adhere properly for corrosion resistance and mechanical integrity.
• Quality control in coating processes: Used by coating specialists to verify adhesion after plating or deposition of metallic layers.
• Materials research and development: Helps in evaluating new metallic coating formulations or process optimizations for enhanced adhesion performance.
• Compliance verification: Supports certification processes by meeting industry-standard requirements for coating reliability.
• Other ductile metal coating industries: Although aerospace is the main focus, the method can be adapted to other sectors requiring strict adhesion testing of ductile metallic coatings.

Related Standards

To complement EN 2828:1993, other related international and European standards that provide guidelines and testing methods for coatings in aerospace and industrial applications include:

• EN ISO 4541 – Methods for adhesion testing of paint coatings on metallic substrates.
• EN 12373 series – Various methods for testing paint adhesion and durability.
• EN 13887 – Non-destructive testing of coatings on metallic materials.
• ISO 9227 – Corrosion tests in artificial atmospheres, useful for assessing coating protection.
• MIL-C-5541 – Military specifications for cadmium plating, often referenced alongside adhesion testing.

These standards collectively support the robust evaluation of metallic coatings, ensuring that aerospace components meet stringent durability and safety requirements.

Adopting EN 2828:1993 for adhesion testing of metallic coatings by burnishing guarantees compliance with aerospace industry expectations, enhancing component reliability through precise quality control measures. Whether for new manufacturing or maintenance inspections, this standard provides a proven methodology to assess and ensure the performance of thin, ductile metal coatings critical to aerospace safety and efficiency.