ISO 22731-2020 PDF

Full title and description

ISO 22731:2020 — Carbonaceous materials used in the production of aluminium — Cathode — Cathode abrasion testing. This International Standard specifies a laboratory method to determine the resistance to physical abrasion of a cathode sample used in aluminium production, enabling comparison of materials and quality control of cathode blocks.

Abstract

This document specifies a method for the determination of the resistance to physical abrasion of a cathode sample. The procedure covers sample preparation, test apparatus and the abrasion test itself, and defines how results are expressed to characterise cathode abrasion resistance.

General information

• Status: Published.
• Publication date: 28 September 2020.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 71.100.10 — Materials for aluminium production.
• Edition / version: Edition 1 (2020).
• Number of pages: 2.

Scope

ISO 22731:2020 applies to carbonaceous cathode materials used in aluminium production and gives a standardised abrasion test for small cathode samples. The scope covers required test equipment, preparation of representative test specimens, test conditions and a method for measuring and reporting abrasion resistance so that different cathode materials and production batches can be compared under a common procedure. The standard is intended for use in laboratory and quality-control environments associated with cathode manufacture and aluminium smelting operations.

Key topics and requirements

• Definition of test specimen dimensions and preparation to ensure representative sampling of cathode block material.
• Specification of abrasion-test apparatus and abrasive medium (type and particle characteristics) to be used.
• Detailed step-by-step test procedure including load, speed, duration and environmental considerations.
• Calculation and expression of abrasion resistance results (mass loss, wear rate, or equivalent metrics) and recommended reporting format.
• Guidance on repeatability, reproducibility and interpretation of test results for material comparison and quality control.

Typical use and users

Typical users include cathode and refractory material manufacturers, aluminium smelter technical and QA laboratories, materials testing laboratories, product development teams and researchers in the aluminium industry. The standard is used for incoming material inspection, production quality control, supplier comparison, R&D evaluation of new carbonaceous formulations, and for process troubleshooting related to cathode wear.

Related standards

ISO 22731:2020 is part of the ISO/TC 226 family addressing carbonaceous materials for aluminium production. Closely related standards include various ISO methods on sampling and testing of cathode and anode materials and coke (for example ISO 8007 series on sampling, ISO 12981-1 on calcined coke reactivity, ISO 17499 on determination of baking level, and other ISO/TC 226 test methods and sampling standards). Users typically consult these related ISO methods together with ISO 22731 for a comprehensive test and quality framework.

Keywords

cathode abrasion, carbonaceous materials, cathode blocks, aluminium production, abrasion testing, ISO 22731, ISO/TC 226, material testing, quality control.

FAQ

Q: What is this standard?

A: ISO 22731:2020 is an International Standard that specifies a laboratory method to measure the resistance to physical abrasion of cathode samples used in aluminium production.

Q: What does it cover?

A: It covers specimen preparation, required test apparatus, the abrasion test procedure and how to calculate and report abrasion-resistance results so materials can be compared and controlled.

Q: Who typically uses it?

A: Cathode and refractory manufacturers, aluminium smelter QA and process laboratories, third‑party testing labs, R&D teams and material engineers involved in cathode selection and evaluation.

Q: Is it current or superseded?

A: It was published on 28 September 2020 and is the current edition (Edition 1). The ISO record shows the standard is under systematic review in the ISO lifecycle (standards are reviewed periodically, typically every 5 years).

Q: Is it part of a series?

A: It belongs to the suite of ISO standards for carbonaceous materials and the ISO/TC 226 technical committee’s work programme (ICS 71.100.10). Other related test and sampling standards for cathodes, anodes and coke are published under the same committee.

Q: What are the key keywords?

A: Cathode abrasion, carbonaceous materials, aluminium production, abrasion test, wear resistance, material characterisation, ISO 22731.