GOST 12020-2018 PDF

Full title and description

GOST 12020-2018 — Plastics. Methods of test for determination of resistance to chemical substances (Russian: Пластмассы. Методы определения стойкости к действию химических сред). This national (interstate) standard reproduces and adapts the procedures of ISO 175:2010 for use in the GOST system, giving requirements and procedures for exposing plastic test specimens to liquid chemicals and for evaluating resulting changes in properties.

Abstract

Specifies a standardized method to immerse solid plastic test specimens (mouldings, extrusions, plates, tubes, rods, sheets >0.1 mm) in selected liquid chemicals and to determine changes in mass, dimensions, appearance and relevant physical or mechanical properties after immersion. The standard covers test liquids, conditioning, immersion conditions (time, temperature), specimen preparation and reporting of results; it does not cover environmental stress cracking (ESC), which is addressed in other ISO/GOST parts.

General information

• Status: Active / in force (national adoption — GOST).
• Publication date: 2018 (approved 27 February 2018; introduced into force 1 October 2018).
• Publisher: Federal Agency on Technical Regulating and Metrology (Rosstandart) / Interstate Council on Standardization (national adoption body).
• ICS / categories: 83.080.01 — Plastics in general.
• Edition / version: GOST 12020-2018 (national adoption, modified from ISO 175:2010).
• Number of pages: 27 (published national editions typically 27–28 pages depending on publisher formatting).

Scope

Applies to solid plastics in forms such as moulding or extrusion materials, plates, tubes, rods and sheets (thickness > 0.1 mm). Defines immersion testing of the entire specimen surface in laboratory test liquids to determine effects of chemical exposure on appearance, mass, dimensional stability and other physical or mechanical properties. The standard is intended for routine laboratory assessment, quality control and comparative evaluation of material resistance to specific chemicals; it excludes tests for environmental stress cracking (ESC) and does not apply to cellular (foamed) plastics.

Key topics and requirements

• Definition of test liquids and selection guidance (laboratory chemicals, reagents, solvents, industrial fluids).
• Specimen preparation and conditioning (dimensions, surface condition, removal of residual stresses where applicable).
• Immersion procedure: apparatus, free (unrestrained) immersion of whole-surface specimens, controlled temperature and time schedules.
• Measurements and acceptance criteria: changes in mass, dimensions, colour/appearance and other specified physical or mechanical properties (e.g., tensile, flexural properties, hardness) after exposure.
• Expression of results, calculation methods and required contents of the test report (test conditions, specimen identification, pre- and post-test measurements).
• Precision and reproducibility notes plus normative/informative annexes listing typical test liquids and conditioning notes.

Typical use and users

Used by materials laboratories, plastics manufacturers, quality-control departments, product designers and R&D groups to verify chemical resistance of polymers and polymer products. Relevant for spec writers, certification bodies, purchasers specifying materials for chemical service, and regulators requiring documented test evidence of chemical compatibility.

Related standards

Directly related to ISO 175:2010 (source international standard). Other related documents include ISO 2818 (preparation of test specimens), ISO 291 (conditioning atmospheres), the ISO/GOST series addressing environmental stress cracking (ISO 22088 series), and national predecessor standards such as GOST 12020-72 and referenced GOSTs on test methods for mechanical properties.

Keywords

plastics; chemical resistance; immersion test; ISO 175; specimen conditioning; mass change; dimensional stability; appearance; test report; GOST 12020-2018.

FAQ

Q: What is this standard?

A: GOST 12020-2018 is the national (GOST) standard that establishes test methods for determining the effects of immersion of solid plastics in liquid chemicals (adoption/modification of ISO 175:2010).

Q: What does it cover?

A: It covers procedures for immersing unrestrained plastic specimens in selected liquids, the conditioning and measurement protocols, and the methods to quantify changes in mass, dimensions, appearance and other specified properties resulting from immersion.

Q: Who typically uses it?

A: Materials testing laboratories, polymer producers, quality and compliance engineers, product designers specifying materials for chemical exposure, and certification bodies.

Q: Is it current or superseded?

A: The 2018 GOST adoption is the active national version (introduced 1 October 2018). It is a national implementation/modification of ISO 175:2010; users should check their national standards registry for any later amendments or revisions.

Q: Is it part of a series?

A: It is linked to the family of test standards for plastics (conditioning, specimen preparation and environmental/chemical resistance). Environmental stress cracking and related topics are addressed in separate ISO/GOST parts (for example the ISO 22088 series).

Q: What are the key keywords?

A: Plastics, chemical resistance, immersion, test methods, ISO 175, conditioning, mass change, dimensional change, appearance, mechanical properties.