GOST 6321-92 PDF

Full title and description

GOST 6321-92 — "Engine fuels. Method for copper strip test" (Russian: "Топливо для двигателей. Метод испытания на медной пластинке"). The standard specifies a laboratory test (copper strip test) to assess the corrosive effect of liquid engine fuels and related hydrocarbon products on copper under defined temperature and exposure conditions; it is aligned with ISO 2160 (edition referenced in the standard).

Abstract

This standard describes the copper strip test method for determining the corrosiveness of engine fuels and certain solvents toward copper. The method covers sample preparation, test vessels, copper specimen preparation, specified temperatures and exposure times, and evaluation of copper surface discoloration by comparison with a corrosion colour scale. It is intended for use with liquid fuels whose vapour pressure does not exceed the specified safety threshold for the test.

General information

• Status: Active (in force / implemented 01 January 1993).
• Publication date: Designation year 1992; date of entry into force 01.01.1993.
• Publisher: Russian national standards authority (Gosstandart / Rosstandart) — national GOST publication.
• ICS / categories: 75.160.20 (Liquid fuel / fuels and petroleum products).
• Edition / version: GOST 6321-92 (1992 edition, implemented 1993). The standard text references ISO 2160 (the version adopted in the GOST text).
• Number of pages: Approximately 11–12 pages (commercial copies list 11 or 12 pages depending on format).

Scope

Applies to engine fuels and certain related petroleum products and solvents to determine their corrosive effect on copper by immersion of a prepared copper strip in the fuel sample at specified temperatures and durations. Typical product groups covered include motor gasoline, aviation gasoline, gasolines with limited vapour pressure, kerosine, diesel and distillate fuels, white spirits and similar solvents, and some lubricating oils under specified conditions. The standard also includes safety notes regarding testing of high‑vapour‑pressure samples and guidance on selecting test temperature according to product type.

Key topics and requirements

• Definition and purpose of the copper strip (corrosion) test for liquid fuels.
• Preparation and polishing of copper test specimens to specified dimensions and surface finish.
• Specified test vessels, sealing, and protection from strong light during exposure.
• Prescribed temperatures and exposure times by product type (examples: 100 °C for many products, 50 °C or 100 °C for others; gasolines with higher vapour pressures require lower temperature or alternative methods).
• Evaluation procedure using a colour (corrosion) comparator/scale to rate copper discoloration and classification of corrosivity.
• Safety precautions for volatile samples (vapour pressure limits and alternative test methods if exceeded).

Typical use and users

Used by petroleum/refining laboratories, fuel quality control laboratories, fuel producers and distributors, independent testing houses, equipment manufacturers (to assess compatibility with copper-containing components), and regulatory agencies for conformity assessment and procurement testing. It is applied during product development, batch release testing, and comparative quality monitoring.

Related standards

Closely related to ISO 2160 (international copper strip test method) and other national/codified methods for corrosiveness testing. Other complementary standards include national fuel specifications and methods addressing vapour pressure limits, alternative corrosion testing methods, and broader fuel property test methods (these are commonly cross-referenced in fuel testing suites and national fuel standards).

Keywords

copper strip test; corrosiveness to copper; engine fuels; petroleum products; fuel quality; corrosion test; GOST 6321-92; ISO 2160.

FAQ

Q: What is this standard?

A: GOST 6321-92 is the Russian national standard that specifies the copper strip test method for assessing the corrosive effect of engine fuels and certain petroleum products on copper surfaces.

Q: What does it cover?

A: It covers specimen preparation, test vessels and conditions (temperatures and times), exposure procedure, evaluation by colour comparison with a corrosion scale, and safety measures for volatile samples.

Q: Who typically uses it?

A: Fuel testing laboratories, refiners, fuel suppliers, procurement agencies, independent test houses and regulators use it for quality control, conformity assessment and compatibility checks.

Q: Is it current or superseded?

A: GOST 6321-92 is listed as active / in force (implemented 01.01.1993) in the Russian GOST catalogue. It references ISO 2160 (the ISO copper strip test series) as the international basis; users should check for any newer national or international revisions that may be cited in current test programmes.

Q: Is it part of a series?

A: It is one of a suite of fuel testing methods in the GOST system and is aligned to the ISO copper strip test family (ISO 2160 and later revisions). Related fuel property standards and national fuel specifications commonly reference this method.

Q: What are the key keywords?

A: copper strip test; corrosion; engine fuels; fuel quality; petroleum products; GOST 6321-92; ISO 2160.