GOST 6032-2017 PDF

Full title and description

GOST 6032-2017 — "Corrosion‑resistant steels and alloys. Test methods of intercrystalline (intergranular) corrosion resistance." The standard defines a set of standardized laboratory test procedures used to determine the tendency of stainless steels and iron‑nickel alloys (including duplex and layered products, welded joints and surfacing deposits) to develop intergranular corrosion under specified thermal and chemical exposures.

Abstract

This interstate (GOST) standard establishes multiple test methods (designated by letters, e.g. AMU, AMUF, AM, VU, DU, V, B and related recommended procedures) for provoking and detecting intergranular corrosion in different classes of corrosion‑resistant steels and iron‑nickel alloys. It covers sample preparation, heat‑treatment (provoking) regimes, chemical test media and reagents, test durations, evaluation criteria (mass‑loss, bend tests, metallographic examination) and reporting requirements for laboratory determination of susceptibility to intergranular attack.

General information

• Status: Active / in force; replaces GOST 6032-2003.
• Publication date: Approved 12 September 2017; date of introduction (into force) 1 August 2018.
• Publisher: Federal Agency for Technical Regulation and Metrology (Rosstandart) — issued as an interstate (Межгосударственный) standard adopted by the relevant interstate council.
• ICS / categories: 77.060 (Corrosion of metals / Metallurgy).
• Edition / version: GOST 6032-2017 (current edition; replaces GOST 6032-2003).
• Number of pages: 36 (standard text — typical published PDF length).

Scope

The standard applies to corrosion‑resistant steels of austenitic, ferritic, martensitic‑austenitic and austenitic‑ferritic (duplex) classes and to iron‑nickel based alloys. It specifies which laboratory test method(s) are appropriate depending on chemical composition and product type, and it covers both base metal and welded or surfaced metal. The standard is limited to methods for assessing susceptibility to intergranular (grain‑boundary) corrosion and does not address general corrosion, pitting, crevice corrosion or stress‑corrosion cracking except where those phenomena are relevant to method selection or interpretation.

Key topics and requirements

• Standardized test methods identified by letter codes (examples: AMU, AMUF, AM, VU, DU, V, B) and their applicability by alloy class and composition.
• Sample selection and preparation rules (dimensions, cutting locations, handling, surface finish and degreasing).
• Provoking (sensitizing) heat‑treatment regimes for different steel types to accelerate precipitation of chromium‑rich phases at grain boundaries.
• Chemical test media and reagents (examples: sulfuric acid + copper sulfate variations, sulfuric acid + metal powders, 65% boiling nitric acid for the DU method, specific additions such as fluoride ions for AMUF), and preparation/storage of test solutions.
• Test procedures: immersion/boiling exposures, cyclic test schedules, mass‑loss measurements, bend‑test protocols and metallographic examination (etching and microstructural analysis) to detect intergranular attack.
• Evaluation criteria and result interpretation: determination of susceptibility vs. non‑susceptibility by mass‑loss limits, presence of cracks after bending, metallographic evidence of intergranular attack and procedural acceptance rules.
• Safety and laboratory practice requirements for working with concentrated acids and toxic reagents; requirements for documentation and test reporting (protocol contents).

Typical use and users

GOST 6032-2017 is used by metallurgical testing laboratories, quality control and R&D departments of stainless‑steel producers and fabricators, inspection bodies, certification and conformity assessment laboratories, and engineering teams specifying materials for pressure equipment, piping, chemical process plant, oil & gas and other corrosive service environments. Laboratories apply the selected method(s) to verify material conformances called out in technical specifications, procurement documents and welding acceptance procedures.

Related standards

The standard references and compares to international and national methods for intergranular corrosion testing (for example, ISO 3651‑1/‑2 family, ASTM A262 series and JIS G0575). It formally replaces the earlier national edition GOST 6032‑2003 and cross‑references specific reagent and chemical standards used in test solutions (various GOST reagent standards). Comparison tables in the normative annexes show equivalence/differences in provoking regimes and evaluation criteria versus ISO/ASTM approaches.

Keywords

intergranular corrosion; intercrystalline corrosion; stainless steel; corrosion‑resistant alloys; test methods; sensitization; Huey/DU method; sulfuric acid + copper sulfate; sample preparation; metallographic examination; welding; GOST 6032-2017.

FAQ

Q: What is this standard?

A: GOST 6032-2017 is an interstate (GOST) standard that specifies laboratory test methods to determine the resistance (or susceptibility) of corrosion‑resistant steels and iron‑nickel alloys to intergranular (intercrystalline) corrosion.

Q: What does it cover?

A: It covers selection and preparation of test specimens, provoking (sensitizing) heat treatments, detailed chemical test media and reagent compositions, procedural steps for a range of test methods (identified by letter codes), evaluation criteria (mass loss, bend/crack detection, metallographic signs of intergranular attack), and reporting requirements.

Q: Who typically uses it?

A: Accredited corrosion and metallurgical laboratories, material suppliers and manufacturers of stainless‑steel equipment, welding and fabrication quality control engineers, and certification/inspection bodies that need to verify a material's susceptibility to intergranular corrosion for product acceptance or specification compliance.

Q: Is it current or superseded?

A: The 2017 edition is the current GOST edition (GOST 6032‑2017) which replaced the 2003 version; it was approved in September 2017 and put into effect on 1 August 2018.

Q: Is it part of a series?

A: It is a stand‑alone GOST (interstate) standard covering intergranular corrosion test methods, but it cross‑references and adapts elements of international standards (e.g., ISO 3651 parts) and sits among related metallurgy and corrosion testing standards and reagent specifications.

Q: What are the key keywords?

A: Intergranular corrosion, stainless steel, corrosion‑resistant alloys, test methods, sensitization, Huey/DU, sulfuric acid/copper sulfate tests, metallography, GOST 6032‑2017.