GOST 9.048-89 PDF

Full title and description

GOST 9.048-89 — Единая система защиты от коррозии и старения. Изделия технические. Методы лабораторных испытаний на стойкость к воздействию плесневых грибов. (English: Unified system of corrosion and ageing protection. Technical items. Methods of laboratory tests for mould resistance).

Abstract

GOST 9.048-89 defines four laboratory test methods to assess the resistance of technical products and their components to mould (mould‑fungi) attack. The standard specifies specimen selection, test fungi species (with a separate list for optical parts), environmental conditions (temperature and humidity), exposure duration and criteria for evaluating mould damage and functional impairment. It is intended for use where product normative documents require fungal resistance testing.

General information

• Status: Active / in force (introduced 1991; listed as действующий in registries).
• Publication date: Approved 26 June 1989; original designation year 1989; effective from 1 July 1991.
• Publisher: State Committee for Standards of the USSR (Gosstandart) / published by the standards publisher (Izd-vo Standartov).
• ICS / categories: Classification: climatic/testing category — MKS/ICS related to climatic and environmental testing (listed as 19.040 / OKS 19.40 in catalogues).
• Edition / version: Edition 1989 (GOST 9.048-89); replaces earlier GOST 9.048-75.
• Number of pages: 23 pages (standard text length).

Scope

The standard applies to technical items (designations T, ТВ, ТМ, ОМ, О, В) of all placement categories except category 4.1 per GOST 15150. It establishes four laboratory methods: (1) tests on cleaned samples to verify material selection and manufacturing defects; (2) tests to evaluate influence of external contamination during assembly/operation/storage; (3) tests of the influence of external contamination on both mould resistance and operational performance; (4) tests of the effect of intensive mould development on product operability. Application is intended where product standards or technical specifications require mould resistance testing; exemptions are permitted when manufacturing materials/processes are unchanged from previously tested items or for items in hermetic enclosures.

Key topics and requirements

• Four defined laboratory test methods addressing material choice, contamination effects, performance impact, and severe mould development effects.
• Lists of test fungi for general items and a separate list for optical components (e.g., Aspergillus niger, Aspergillus terreus, Aureobasidium pullulans, Paecilomyces variotii, Penicillium spp., Scopulariopsis brevicaulis, Trichoderma viride; optical tests include Aspergillus penicilloides, Penicillium chrysogenum among others).
• Specified incubation conditions: temperature (29 ± 2 °C), relative humidity above 90%, exposure duration typically 28 days for method 1 (and defined regimes for other methods).
• Requirements for test equipment, sample preparation and sample counts (minimum three samples if not otherwise specified in the product NTD).
• Evaluation criteria and acceptance/rejection guidance are to be set in product standards or technical documentation; the standard provides recommendations for method selection and acceptance criteria.

Typical use and users

Engineers and laboratories performing environmental and durability testing on electronic/mechanical/optical equipment, manufacturers specifying fungal resistance in technical specifications, quality assurance and certification bodies assessing product suitability for humid or biologically active environments, and research organizations studying material biostability. The standard is used when product normative documents call for mould-resistance testing.

Related standards

Standards referenced within or commonly used alongside GOST 9.048-89 include GOST 15150 (placements / climatic categories), related ESZKS (Unified system of corrosion and ageing protection) standards such as other GOSTs for laboratory glassware, measurement equipment and reagents, and earlier GOST 9.048-75 which this edition replaced. Product-specific standards or technical conditions may add detailed criteria and modifications.

Keywords

mould resistance, fungal resistance, biostability, environmental testing, climatic tests, corrosion and ageing protection, laboratory test methods, technical products, GOST 9.048-89.

FAQ

Q: What is this standard?

A: GOST 9.048-89 is a Soviet/Russian standard that defines laboratory test methods for assessing the resistance of technical products to mould (mould‑forming fungi) within the Unified System for Protection against Corrosion and Ageing.

Q: What does it cover?

A: It covers four laboratory test methods (material selection and manufacturing defects; effects of external contamination during assembly/operation/storage; effects of contamination on performance; and effects of intensive mould growth on operability), the list of fungal test species (with separate lists for optical components), test conditions (e.g., 29 ± 2 °C, >90% RH, typical 28‑day exposure), equipment and sample requirements, and guidance on evaluation criteria.

Q: Who typically uses it?

A: Test and research laboratories, product designers and manufacturers of technical and electronic equipment, QA/certification bodies, and standards authors who need to verify or specify mould resistance of products intended for humid or biologically active environments.

Q: Is it current or superseded?

A: The 1989 edition (GOST 9.048-89) replaced the 1975 version (GOST 9.048-75). Registries and standards catalogues list the 1989 edition as действующий (in force) with introduction effective 1 July 1991; users should check national standards registries for any later amendments or replacements.

Q: Is it part of a series?

A: Yes — it is part of the ESZKS (Unified system of protection against corrosion and ageing) family of GOSTs covering protective measures, test methods and materials for corrosion and ageing resistance. It is commonly used together with related GOSTs referenced in its introductory and normative sections.

Q: What are the key keywords?

A: mould resistance; fungal testing; biostability; climatic tests; corrosion and ageing protection; laboratory methods; technical products; GOST 9.048-89.