ISO 1055-1975 PDF

Full title and description

ISO 1055:1975 — Zinc and zinc alloys — Determination of iron content — Spectrophotometric method. This International Standard specifies a spectrophotometric analytical procedure for determining iron in zinc and selected zinc alloys and die castings.

Abstract

This standard describes a laboratory spectrophotometric method for the chemical determination of iron in zinc and zinc alloys. The procedure covers sample dissolution, oxidation/reduction steps, preparation of standard solutions and photometric measurement, and is intended for iron contents in the low-hundredths of a percent range.

General information

• Status: Withdrawn.
• Publication date: June 1975 (First edition).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 77.120.60 (Metallurgy — Zinc and zinc alloys / analytical methods).
• Edition / version: Edition 1 (1975).
• Number of pages: 2 (concise method document).

These bibliographic details are taken from the ISO catalogue entry and published reproductions of the standard.

Scope

The standard applies a spectrophotometric technique to determine iron in zinc and certain zinc alloys (including typical die-casting alloys such as Zn-Al variants). It is suitable for iron concentrations approximately in the range 0.01 % to 0.08 % and is intended for laboratory quality control and chemical analysis of ingots, castings and alloy samples.

Key topics and requirements

• Analytical principle: spectrophotometric measurement of iron following chemical treatment of the sample.
• Scope of applicability: zinc and zinc alloys (identified alloy designations / die castings) and samples containing small percentages of copper as noted in the method.
• Sample preparation: dissolution of zinc alloys, oxidation/reduction and removal/decomposition of excess reagents prior to measurement.
• Calibration: preparation of iron standard solutions and defined dilution procedure to achieve the method’s stated concentration range.
• Performance range: designed for reliable determination in the order of hundredths of a percent (approx. 0.01–0.08 % Fe).

Typical use and users

Used by metallurgical laboratories, quality-control departments at foundries and die-casting facilities, material testing laboratories, and standards organizations performing compositional analysis of zinc materials. The method is suited to routine QC checks and comparative analysis where spectrophotometric equipment and basic wet-chemistry facilities are available.

Related standards

ISO 1055:1975 originates from earlier ISO/R 1055 (recommendation) and has been adopted or referenced in national implementations (for example as DIN/ISO versions). Later or regional documents on zinc alloy analysis and photometric methods (and national equivalents or replacements) should be consulted for current practice; consult the ISO catalogue or national standards bodies for superseding documents.

Keywords

zinc; zinc alloys; iron determination; spectrophotometry; chemical analysis; die castings; metallurgical testing; ISO 1055; alloy analysis.

FAQ

Q: What is this standard?

A: ISO 1055:1975 is an International Standard that defines a spectrophotometric method for determining the iron content of zinc and certain zinc alloys.

Q: What does it cover?

A: It covers sample dissolution and preparation, preparation of iron standards, the spectrophotometric measurement procedure, and is intended for iron concentrations roughly between 0.01 % and 0.08 % in zinc-based materials.

Q: Who typically uses it?

A: Metallurgical and analytical laboratories, foundry and die-casting quality-control personnel, materials inspectors and anyone performing chemical composition checks on zinc alloys.

Q: Is it current or superseded?

A: The document is listed as Withdrawn in the ISO catalogue. Users should check the ISO catalogue or their national standards body for any replacement or more recent methods that have superseded ISO 1055:1975.

Q: Is it part of a series?

A: ISO 1055 was produced under ISO/TC 18 activities and derives from earlier ISO/R 1055; related standards cover other analytical and metallurgical specifications for zinc and zinc alloys. National adoptions (DIN, etc.) and later regional standards may reference or incorporate the method.

Q: What are the key keywords?

A: Zinc, zinc alloys, iron, spectrophotometric method, chemical analysis, die castings, ISO 1055.