GOST 9.307-89 PDF
Name in English:
GOST 9.307-89
Name in Russian:
ГОСТ 9.307-89
United system of corrosion and ageing protection. Hot dip zinc coating. General requirement and methods of checking
Full title and description
GOST 9.307-89 — "Unified system of protection against corrosion and ageing. Hot‑dip zinc coatings. General requirements and methods of inspection." The standard establishes general technical requirements and inspection (quality control) methods for protective hot‑dip zinc coatings applied to steel and iron products; it is aligned with ISO 1461:1989.
Abstract
GOST 9.307-89 sets out the scope, basic definitions, acceptance criteria and test methods used to evaluate hot‑dip galvanized (zinc) coatings on structural steel, rolled sections, pipes, wire goods, fasteners and castings. It gives requirements for the coating condition and thickness and references relevant test and measurement procedures used for quality control. The text was published in the late 1980s and has since been superseded by an updated 2021 version.
General information
- Status: Replaced / superseded (withdrawn from current enforcement; replaced by GOST 9.307-2021).
- Publication date: Issued 23 August 1989; came into force (effective date) 1 July 1990.
- Publisher: Межгосударственный стандарт (interstate/state standards body — Soviet/Mezhgosstandart lineage; later maintained in Russian national collections).
- ICS / categories: 25.220 Surface treatment and coating; metal coatings (commonly shown as 25.220.40).
- Edition / version: Original designation GOST 9.307-89 (1989). Replaced by GOST 9.307-2021 (current replacement).
- Number of pages: Editions listed online vary by publisher/collection (commonly shown as 5 pages in some collections, 8 pages in other reproductions).
Scope
This standard applies to protective hot‑dip zinc coatings applied to steel and iron products (structural steel, shaped and sheet products, sets of pipes and large‑diameter pipes prepared before coating, containers, steel wire products, bulk‑processed fasteners, steel and iron castings, forgings and stamped steel items). It defines the general requirements for coatings and for the base metal and specifies methods of control and acceptance for galvanizing operations; it does not cover continuously applied coatings.
Key topics and requirements
- Definition of the types and intended applications of hot‑dip zinc coatings for steel and iron articles.
- General requirements for the base metal condition prior to galvanizing (cleanliness, removal of scale/contaminants).
- Acceptance criteria for coating appearance and integrity (coverage, absence of gross defects such as runs, bare spots and heavy flux residues).
- Methods for measuring and controlling coating thickness and mass of zinc (magnetic, coulometric or gravimetric/weight‑loss approaches are referenced by later and related standards).
- Inspection and sampling procedures to verify conformity during production and at delivery.
- Reference to international standard ISO 1461:1989 as a normative source and linkage to subsequent national standards and updates.
Typical use and users
Used by galvanizing plants, metal‑fabrication shops, quality control and inspection laboratories, procurement and specification engineers, and clients specifying corrosion protection for structural and industrial steelworks. It serves as a baseline technical requirement for manufacturers and purchasers of galvanized metal products in construction, infrastructure, pipelines and general engineering.
Related standards
Key related and referenced documents include ISO 1461:1989 (hot‑dip galvanized coatings — general requirements), successor national standard GOST 9.307-2021 (which supersedes GOST 9.307-89), and other GOST documents covering surface preparation and coating tests such as GOST 9.301, GOST 9.402 and referenced test/chemical standards. These are commonly listed in the normative references of the standard.
Keywords
hot‑dip galvanizing, zinc coating, corrosion protection, coating thickness, galvanizing inspection, ISO 1461, GOST 9.307, protective coatings, steel surface preparation.
FAQ
Q: What is this standard?
A: GOST 9.307-89 is a national (interstate) standard titled "Unified system of protection against corrosion and ageing. Hot‑dip zinc coatings. General requirements and methods of inspection" that specifies general technical and inspection requirements for hot‑dip zinc coatings on steel and iron products.
Q: What does it cover?
A: It covers scope, basic requirements for coatings and base metal, acceptance criteria for coating condition, and methods of control and inspection for hot‑dip galvanizing applied to structural steel, rolled products, pipes, wire goods, fasteners and castings. It does not apply to certain continuous coating processes.
Q: Who typically uses it?
A: Galvanizing works, metal fabricators, QC/inspection laboratories, specifications and procurement engineers in construction, pipeline, transport and industrial manufacturing sectors.
Q: Is it current or superseded?
A: It has been superseded — GOST 9.307-89 was replaced by GOST 9.307-2021; the older 9.307-89 text is shown in collections as withdrawn/ replaced and is no longer the active governing document for new specifications.
Q: Is it part of a series?
A: Yes — it belongs to the Unified System of Protection against Corrosion and Ageing (ЕСЗКС / ESZKS) series of standards (GOST 9.xxx), which together address inorganic and paint coatings, surface preparation, test methods and corrosion protection measures.
Q: What are the key keywords?
A: Hot‑dip zinc coating, galvanizing, corrosion protection, coating thickness/consumption, inspection methods, ISO 1461, GOST 9.307.