Corrosion Resistance Test: Metallic Components in Footwear Accessories

ISO 22775: Footwear — Test methods for accessories: Metallic accessories — Corrosion resistance

What is ISO 22775?

ISO 22775 is a test standard that assesses the corrosion resistance of metallic parts used in footwear accessories. This standard is applicable to the following metallic elements used in footwear design

• Buckles
• Chains
• Metal labels and logos
• Buttons and zippers

The standard tests the corrosion behavior of metallic parts under different environmental conditions, ensuring that the footwear meets quality and durability standards.

The ISO 22775 standard includes methods for determining the corrosion resistance of shoe accessories. Accessories of shoes that are used continuously may change visually or in quality due to different factors.

Within the scope of this standard, corrosion resistance is determined by two different methods, especially metal accessories sulfide blackening and salt water corrosion. The corrosion resistance of footwear accessories is a factor affecting the visual and functional quality of the product.

Purpose of Tests

Corrosion resistance tests of metallic components aim to assess whether the product retains its aesthetics and functionality over time. The main objectives of these tests are:

• Prevent Corrosion Damage: To detect rusting or discoloration of metal surfaces.
• Increasing Product Durability: To ensure the selection of metal components suitable for long-term use.
• Ensuring Consumer Satisfaction: To provide high quality and reliable products.

Test Methods

The test methods used in the ISO 22775 standard are designed to measure the durability of metallic components against different environmental and chemical influences.

a) Salt Spray Test: Tests the resistance of metal surfaces to the action of salt water vapor. The metallic part is placed in a cabinet sprayed with salt solution and left for a certain period of time (e.g. 24 hours). Signs of corrosion on the surface (rusting, discoloration) are evaluated.

b) Humidity and Temperature Cycles: Tests the durability of accessories in humid and hot environments. The sample is exposed to different temperature and humidity levels in a controlled environment. The oxidation and deformation of the metal surface is examined.

c) Chemical Resistance Test: Measures the resistance of metallic parts to chemicals such as detergents and sweat. Samples are brought into contact with standard chemical solutions and observed for a certain period of time. Corrosion or coating loss due to chemical action is checked.

d) Mechanical Abrasion Test: To evaluate the resistance of metal surfaces to mechanical friction and abrasion. Specimens are subjected to a friction test in a controlled environment. Coating integrity and surface damage are assessed.

Evaluation of Test Results

After the tests are completed, evaluation is made in accordance with the following criteria:

• Visual Inspection of Corrosion: Is there rusting, discoloration or deformation on the surface?
• Coating Integrity: Any abrasion or peeling of the coating.
• Mechanical Durability: Whether the accessory retains its functionality after the test.

The test results determine whether the metal part complies with standards and is suitable for use.

Nanolab Laboratories Group continues to provide services within the scope of Corrosion Resistance Testing. We also provide services in Metal Product Analysis.

Contact us for more information.

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