DIN Standards Committee Coatings and Coating Materials
Paints and varnishes - Evaluation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 10: Assessment of degree of filiform corrosion (ISO/FDIS 4628-10:2023); German version FprEN ISO 4628-10:2023
Abstract
This document specifies a method for assessing the amount of filiform corrosion developed from a scribed mark by measuring the length of the longest filament L and the most frequent length M of filaments. Pictorial examples provided in Annex A of this document illustrate different ratings for the length of the longest filament L and the most frequent length M of the filaments. A comparison of the test panels with the 12 pictures in Annex A does not supersede the obligatory numerical assessment (method 1 or 2). ISO 4628-1 defines a system used for designating the quantity and size of defects and the intensity of uniform changes in appearance of coatings and outlines the general principles of the system. This system is intended to be used, in particular, for defects caused by ageing and weathering, and for uniform changes such as colour changes, for example yellowing.
Begin
2021-07-12
WI
00139746
Planned document number
DIN EN ISO 4628-10
Project number
00201134
Responsible national committee
NA 002-00-07 AA - General test methods for coating materials and coatings
Responsible european committee
CEN/TC 139 - Paints and varnishes
Responsible international committee
ISO/TC 35/SC 9/WG 31 - Properties after application
draft standard
Paints and varnishes - Evaluation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 10: Assessment of degree of filiform corrosion (ISO/DIS 4628-10:2022); German and English version prEN ISO 4628-10:2022
2022-09
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