ISO 4628-1:2016 塗料とワニス—コーティングの劣化の評価—欠陥の量とサイズの指定、および外観の均一な変化の強度の指定—パート1：一般的な紹介と指定システム | ページ 2

Foreword

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The committee responsible for this document is ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes.

This fourth edition cancels and replaces the third edition (ISO 4628-1:2003), which has been technically revised with the following changes:

• a) a lower limit for visual assessment of defects has been introduced in Table 2;
• b) a normative reference to ISO 13076 for illumination for the assessment has been added.

ISO 4628 consists of the following parts, under the general title Paints and varnishes — Evaluation of degradation of coatings — Designation of quantity and size of defects, and of intensity of uniform changes in appearance:

• Part 1: General introduction and designation system
• Part 2: Assessment of degree of blistering
• Part 3: Assessment of degree of rusting
• Part 4: Assessment of degree of cracking
• Part 5: Assessment of degree of flaking
• Part 6: Assessment of degree of chalking by tape method
• Part 7: Assessment of degree of chalking by velvet method
• Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect
• Part 10: Assessment of degree of filiform corrosion

1 Scope

This part of ISO 4628 defines a system for designating the quantity and size of defects and the intensity of changes in appearance of coatings and outlines the general principles of the system used throughout ISO 4628. This system is intended to be used, in particular, for defects caused by ageing and weathering, and for uniform changes, for example yellowing.

The other parts of ISO 4628 provide pictorial standards or other means for evaluating particular types of defect. As far as possible, already existing evaluation schemes have been used as the basis.

This part of ISO 4628 is also used for assessing defects not covered by the other parts of ISO 4628.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

Bibliography