BS EN ISO 4628-1:2016

 What is ISO 4628-1 - standard for paint coating degradation about?  

In addition to aesthetic appeal, paints and coatings provide protection to underlying substrates from corrosion and exposure, prolonging the life of the product or surface. With exposure to environmental parameters, coating degrades over time. This leads to crack initiation, propagation, and delamination. If the coating is overheated, it can lead to a loss of mass or decomposition. Ingress of aqueous media can lead to a change in the chemical composition of the coating as well.  

ISO 4628-1 is the first part of the ISO 4628 series on the assessment and analysis of paint and varnish degradation due to weathering and age. ISO 4628-1 defines a system for designating the quantity and size of defects and the intensity of changes in the appearance of coatings. ISO 4628-1 outlines the general principles of the system used throughout the ISO 4628 series. This system is intended to be used for defects caused by ageing and weathering, and for uniform changes - for example, yellowing.  

Who is ISO 4628-1 - standard for paint coating degradation for? 

ISO 4628-1, the standard for paint coating degradation is useful for: 

• Manufacturers of paints and varnishes 
• Concerned maintenance teams 
• Product development teams 
• Quality control teams 

Why should you use ISO 4628-1 - standard for paint coating degradation?  

Protective coatings usually perform well until an old age, at which time natural deterioration and degradation occur. Energy acting on a coating can degrade a material by breaking or interfering with the chemical bonds holding the resin together and to a substrate. 

ISO 4628-1 functions as the reference and introduction for the ISO 4628 series, providing you with normative references and general principles of the system. Using ISO 4628-1 guidelines, you would be able to: 

• Evaluate the degradation of coatings 
• Designate the quantity and size of defects
• Designate  the intensity of uniform changes in appearance 

This helps you to design better products and mitigate weathering challenges for coatings, so that your customers can enjoy long-lasting products. 

What’s changed since the last update?  

BS EN ISO 4628-1:2016 supersedes BS EN ISO 4628-1:2003. BS EN ISO 4628-1:2016 includes some technical changes with respect to BS EN ISO 4628-1:2003. These include: 

• A lower limit for visual assessment of defects has been introduced in Table 2 
• A normative reference to ISO 13076 for illumination for the assessment has been added