ISO 4524-4-1985 rus PDF

Full title and description

St ISO 4524-4-1985 rus — Russian-language edition/translation of ISO 4524-4:1985, titled "Metallic coatings — Test methods for electrodeposited gold and gold alloy coatings — Part 4: Determination of gold content". The document specifies laboratory methods for determining the gold content of electrodeposited gold and gold-alloy coatings used for engineering, decorative and protective purposes.

Abstract

This part of ISO 4524 describes procedures for sampling and preparation, removal of gold coatings from the substrate and any undercoats, and analytical methods for determining gold content including fire (cupellation/assay) methods, spectrophotometric techniques and atomic-absorption spectrometry. It also defines the information to be recorded in the test report.

General information

• Status: Withdrawn / superseded.
• Publication date: March 1985 (published 21 March 1985 in ISO listings).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.220.40 — Metallic coatings.
• Edition / version: Edition 1 (1985).
• Number of pages: 2 pages (concise technical specification).

Additional bibliographic notes: the item is commonly offered as a translated "St ISO 4524-4-1985 rus" PDF for Russian-speaking users; national adoptions and catalog listings reference the original ISO bibliographic data.

Scope

Applies to electrodeposited gold and gold-alloy coatings intended for engineering, decorative and protective purposes. Specifies: preparing samples; techniques to remove coatings from substrates with minimal alteration; recommended analytic procedures to determine gold concentration (fire assay, spectrophotometry, atomic absorption); and the required content of a test report so results are reproducible and traceable across laboratories. It does not specify performance requirements for the coatings themselves (thickness, adhesion, appearance) — only the methods for determining gold content.

Key topics and requirements

• Sample selection and preparation: cutting, cleaning and removal of as much base metal as possible before stripping.
• Coating removal techniques: chemical stripping and mechanical precautions to avoid contamination or loss of gold.
• Fire assay (cupellation) procedure for accurate determination of gold mass fraction.
• Spectrophotometric methods for routine analyses when appropriate calibration and validation are in place.
• Atomic absorption spectrometry (AAS) technique for trace and quantitative measurements.
• Test report contents: identification of specimen, method used, sample preparation details, numerical results and uncertainty or repeatability information.

Typical use and users

Used by plating and surface‑finish laboratories, quality control departments in electroplating shops, materials testing laboratories, electronics and connector manufacturers, jewelry and watchmaking inspectors, and procurement/specification engineers who need a standardized method to verify gold content of electroplated finishes.

Related standards

Superseded by later consolidated standards for electrodeposited gold coatings (see ISO 27874:2008 and subsequent ISO 4524 series updates). Other related parts of the ISO 4524 series address porosity tests, environmental (MFG) tests and additional test methods for gold and gold-alloy electrocoatings. National adoptions (e.g. NF ISO 4524-4, PN ISO 4524-4) reflect the original ISO text and its later replacements.

Keywords

electrodeposited gold, gold alloy, metallic coatings, test methods, gold content, fire assay, spectrophotometry, atomic absorption, electroplating quality, ISO 4524-4, rus (Russian translation)

FAQ

Q: What is this standard?

A: ISO 4524-4:1985 is an international test-method specification for determining the gold content of electrodeposited gold and gold-alloy coatings; "St ISO 4524-4-1985 rus" denotes a Russian-language edition or translation of that document.

Q: What does it cover?

A: It covers sample preparation, removal of electroplated coatings from substrates, and analytical procedures (fire assay, spectrophotometry, atomic‑absorption) and the required test-reporting information for gold-content determinations.

Q: Who typically uses it?

A: Electroplating shops, QC/QA laboratories, materials testing services, electronics/connectors manufacturers, jewelers/watchmakers and procurement/specification engineers who need standardized methods for verifying gold content in plated layers.

Q: Is it current or superseded?

A: The 1985 edition has been withdrawn/superseded; later consolidated and updated standards (notably ISO 27874:2008 and subsequent updates to the ISO 4524 series) now cover specification and test methods for electrodeposited gold and gold-alloy coatings. Consult national or ISO catalogues for the current active documents.

Q: Is it part of a series?

A: Yes — ISO 4524 is a multipart series covering various test methods for electrodeposited gold and gold-alloy coatings (other parts address porosity, environmental testing and related methods); parts of the series have been revised over time.

Q: What are the key keywords?

A: Gold content, electrodeposited gold, gold alloy coatings, metallic coatings test methods, fire assay, spectrophotometry, atomic absorption, electroplating quality control.