GOST 9.407-2015 PDF

Full title and description

GOST 9.407-2015 — Unified system of corrosion and ageing protection. Paint coatings. Method of appearance rating. This standard establishes a harmonized procedure for visual and instrument‑assisted assessment of the appearance and decorative/protective condition of paint and coating systems on metallic and non‑metallic substrates.

Abstract

GOST 9.407-2015 defines methods for evaluating changes in the external appearance of paint coatings arising during laboratory tests, storage, transportation and in‑service operation. It provides criteria and scales for rating decorative properties (colour, gloss, surface texture, dirt retention) and protective properties (blistering, cracking, flaking/delamination, corrosion) and specifies how to record results, use reference images/tables and report findings.

General information

• Status: Active (in force).
• Publication date: Introduced by order 10 June 2015; effective from 1 March 2016 (designation year 2015).
• Publisher: Federal Agency on Technical Regulating and Metrology (Rosstandart) / issued as a Межгосударственный стандарт (GOST).
• ICS / categories: 87.020 (corrosion and ageing protection); 25.220.60 (coatings, paints).
• Edition / version: GOST 9.407-2015 (2015 edition, effective 01 March 2016). Includes subsequent published amendments/errata noted in 2021 and 2022.
• Number of pages: 44 pages (full text with annexes).

Scope

The standard applies to paint and varnish coatings on both metallic and non‑metallic surfaces. It is intended for use in acceptance testing, type testing, accelerated ageing and corrosion tests, storage and operational inspections. The method quantifies intensity, number, size and depth of visual defects and provides a combined notation for decorative and protective condition of coating systems.

Key topics and requirements

• Definitions and classification of appearance changes and typical defect types (blisters, cracking, flaking, runs, orange‑peel, discoloration, dirt retention, corrosion under coating).
• Visual rating scales (intensity scores typically 0–5) for decorative changes and tabulated criteria for protective failures.
• Use of standard reference images and tables to determine degrees of blistering, cracking, delamination and corrosion; rules for selecting typical defect size when multiple defects occur.
• Procedures for sampling, surface preparation, viewing conditions (illumination, viewing distance and angle) and measurement aids.
• Recommendations on measurement instruments (color and gloss meters) and calibration materials (reference images, calibration specimens) in annexes.
• Algorithms for calculating damaged area percentages and expressing combined assessments (e.g., decorative code + protective code) and example notations.
• Requirements for test reporting and protocol content consistent with laboratory accreditation practice (reference to ISO/IEC 17025 for test reporting form and content).

Typical use and users

This standard is used by coatings manufacturers, quality control and inspection laboratories, corrosion and surface‑engineering specialists, testing houses, procurement/specification engineers, research and development teams and regulatory bodies responsible for evaluating coating performance and conformity in production and in service.

Related standards

Closely related documents include the ISO 4628 series (assessment of degradation of coatings — e.g., blistering, cracking, flaking and corrosion evaluation), ISO/IEC 17025 (laboratory competence and reporting), earlier national versions of the same method (for example the former GOST 9.407-84) and other GOSTs within the "Unified system of corrosion and ageing protection" family that cover specific tests and requirements for coating systems.

Keywords

appearance rating, paint coatings, visual assessment, blistering, cracking, delamination, corrosion under coating, gloss, colour, rating scale, GOST 9.407-2015

FAQ

Q: What is this standard?

A: GOST 9.407-2015 is the national (interstate) standard that specifies a method for assessing the external appearance of paint and varnish coatings and for recording decorative and protective changes observed during testing or operation.

Q: What does it cover?

A: It covers procedures and criteria for evaluating decorative properties (colour, gloss, texture), identifying and rating defects (blisters, cracks, delamination, corrosion, etc.), use of reference pictures/tables, calculation of damaged areas and preparation of test reports.

Q: Who typically uses it?

A: Coatings manufacturers, independent test laboratories, quality assurance and inspection personnel, corrosion engineers, procurement/specification authors and research groups working on coating performance.

Q: Is it current or superseded?

A: The 2015 edition is listed as active and was brought into force effective 1 March 2016. There have been published amendments and national errata; users should check the national standards registry or the publisher for any newer revisions or replacement projects (revision/draft activity has been recorded in subsequent public discussions).

Q: Is it part of a series?

A: Yes — it is part of the Unified System of Corrosion and Ageing Protection (series of GOSTs dealing with coatings and corrosion protection) and is intended to be used alongside related national and international methods (notably parts of the ISO 4628 series).

Q: What are the key keywords?

A: Appearance rating, paint coatings, visual assessment, blistering, cracking, delamination, corrosion, gloss, colour, GOST.