ISO 3978:1976 PDF

Name: ISO 3978:1976 — Aluminium and aluminium alloys — Determination of chromium — Spectrophotometric method using diphenylcarbazide, after extraction
SKU: ISO 3978:1976
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Aluminium and aluminium alloys — Determination of chromium — Spectrophotometric method using diphenylcarbazide, after extraction

Название (английский):

ISO 3978:1976

Aluminium and aluminium alloys — Determination of chromium — Spectrophotometric method using diphenylcarbazide, after extraction

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 4
Дата публикации:: 1 декабря 1976 г.
Издание:: ISO IS 3978 edition 1 version 1
ICS:: 77.120.10

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Цена:60 €

Описание (английский):

The method is applicable to chromium contents between 0,002 and 0,60 % (m/m). It may be extended to chromium contents of up to 1,5 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 3978:1976 defines a reliable method for the determination of chromium in aluminium and aluminium alloys using a spectrophotometric technique. The method employs diphenylcarbazide after extraction, targeting chromium contents from 0.002% to 0.60% by mass and may be extended up to 1.5% by mass. This international standard ensures accurate, repeatable results and provides guidance for all essential steps of the testing process - from sampling, through to analysis, calculation, and reporting.

Chromium analysis in aluminium alloys is crucial for quality control, conformity assessment, and materials research. The standard specifies principles, required reagents, apparatus, preparation steps, measurement procedures, and results documentation.

Key Topics

Scope and Applicability: This standard is suitable for determining chromium concentrations in aluminium and aluminium alloys ranging from as low as 0.002% up to 1.5% by mass, ensuring flexibility for various industrial material grades.

Testing Principle: The method is based on digesting the sample in a mixture of acids, oxidizing chromium(III) to chromium(VI), extracting with isobutylmethylketone, and finally forming a colored complex with diphenylcarbazide. Spectrophotometric measurement is then performed at approximately 545 nm for quantitative analysis.

Detailed Procedure: The standard details:

Preparation of required chemical reagents and calibration solutions
Use of high-purity laboratory apparatus
Sample preparation and extraction techniques
Procedures for ensuring accuracy (including blank tests)
Data expression and test report formatting

Precision and Consistency: Following ISO 3978:1976 ensures consistency across laboratories by defining strict handling, measurement, and expression parameters.

Applications

Industrial and Quality Assurance

Aluminium Producers and Fabricators: Use this method for routine analysis of chromium content to guarantee alloy specifications, control processing variables, and meet contractual or regulatory requirements.

Research & Development: Material scientists and metallurgists apply this standard when developing new aluminium alloys, as it provides a reliable means to monitor chromium addition and modification.

Accredited Testing Laboratories: The standard offers an internationally recognized reference method needed for ISO 17025 or similar accreditations, supporting laboratory credibility and customer trust.

Regulatory Compliance and Safety

Conformity Assessment: Meeting standards in chromium determination is essential for demonstrating compliance with international, regional, or customer-specific quality and safety regulations.

Resource Optimization: Accurate measurement facilitates efficient use of alloying elements, potentially reducing material costs while maintaining desired properties.

Related Standards

For comprehensive quality control and management in aluminium production, consider referencing the following standards alongside ISO 3978:1976:

ISO 2106 - Aluminium and Aluminium Alloys - Determination of Chromium by Atomic Absorption Spectrometric Method

ISO 8062 - Aluminium Castings - Chemical composition standards

ISO 9117 - Aluminium and Aluminium Alloys - General principles for chemical analysis

ISO 572 - Aluminium and Aluminium Alloys - Sampling Procedures

Adhering to ISO 3978:1976 not only assures precise chromium content analysis but also aligns your processes with globally recognized best practices for aluminium and aluminium alloy testing. This is vital for maintaining high-quality standards and achieving competitive advantage in the global metals market.

ISO 3978:1976 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Industrial and Quality Assurance

Regulatory Compliance and Safety

Related Standards

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