ISO 11127-4:2020 PDF

Preparation of steel substrates before application of paints and related products — Test methods for non-metallic blast-cleaning abrasives — Part 4: Assessment of hardness by a glass slide test

Название (английский):

ISO 11127-4:2020

Preparation of steel substrates before application of paints and related products — Test methods for non-metallic blast-cleaning abrasives — Part 4: Assessment of hardness by a glass slide test

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 4
Дата публикации:: 9 октября 2020 г.
Издание:: ISO IS 11127 edition 3 version 1
ICS:: 25.220.10

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Описание (английский):

This document specifies a method of assessing of whether a non-metallic blast-cleaning abrasive has a minimum hardness of 6 on Mohs' scale. This document is a part of the ISO 11127 series dealing with the sampling and testing of non-metallic abrasives for blast-cleaning. The types of non-metallic abrasive and requirements on each are contained in the ISO 11126 series. The ISO 11126 and ISO 11127 series have been drafted as a coherent set of International Standards on non-metallic blast-cleaning abrasives. Information on all parts of both series is given in Annex A. NOTE The test described in this document is a pass/fail test and is not a method for the accurate determination of hardness.

Технические детали

Технический комитет: ISO/TC 35/SC 12 - Preparation of steel substrates before application of paints and related products
SKU: ISO 11127-4:2020

Abstract

Overview

ISO 11127-4:2020 specifies a simple, reproducible glass slide test to assess whether a non‑metallic blast‑cleaning abrasive attains a minimum hardness of 6 on the Mohs scale. It is a pass/fail test only (not a method for precise hardness measurement) and forms part of the ISO 11127 series of test methods for non‑metallic blast‑cleaning abrasives used in steel substrate preparation before painting and coating.

Key topics and requirements

Purpose: Confirm whether an abrasive sample achieves at least Mohs hardness 6.
Scope: Applies to non‑metallic blast‑cleaning abrasives; types and specific requirements are covered in the ISO 11126 series.
Sampling: Use a representative sample in accordance with ISO 11127-1.
Apparatus
- Microscope with ×10 magnification.
- Soda glass microscope slides with no observable scratches (borosilicate glass is unsuitable).
Test procedure (summary):
- Examine 5 g of material; if grains vary, select 5–10 grains of each colour/size.
- Place selected grains between two soda glass slides.
- Apply pressure and move one slide over the other in a reciprocating motion for 10 s.
- If the glass surfaces show scratches after the test, the abrasive is considered to have a minimum hardness of Mohs 6.
Test report must include:
- Product identification (referencing the appropriate ISO 11126 part when applicable).
- Reference to ISO 11127-4:2020, test result (pass/fail), any deviations, unusual observations, test date and tester identity.
Limitations: This is a qualitative pass/fail screening; it does not provide accurate hardness values.

Practical applications and users

Quality control and QA/QC labs in abrasive manufacturing and blasting service companies.
Paint, coatings and surface preparation specifiers who need to verify abrasive suitability.
Contractors and inspectors validating incoming batches of non‑metallic abrasives (e.g., garnet, olivine, slags).
Procurement teams requiring simple acceptance tests to ensure abrasives meet minimum hardness to achieve effective blast cleaning and coating adhesion.

Benefits: fast, low‑cost screening to avoid soft abrasives that underperform, ensure consistency between batches, and support compliance with coating preparation specifications.

Related standards

ISO 11127 series - Test methods for non‑metallic blast‑cleaning abrasives (sampling, particle size, moisture, chlorides, etc.).
ISO 11126 series - Specifications and classification for non‑metallic blast‑cleaning abrasives.

Keywords: ISO 11127-4:2020, glass slide test, Mohs hardness 6, non-metallic blast-cleaning abrasives, abrasive testing, surface preparation, ISO 11126.

Overview

Key topics and requirements

Purpose: Confirm whether an abrasive sample achieves at least Mohs hardness 6.
Scope: Applies to non‑metallic blast‑cleaning abrasives; types and specific requirements are covered in the ISO 11126 series.
Sampling: Use a representative sample in accordance with ISO 11127-1.
Apparatus
- Microscope with ×10 magnification.
- Soda glass microscope slides with no observable scratches (borosilicate glass is unsuitable).
Test procedure (summary):
- Examine 5 g of material; if grains vary, select 5–10 grains of each colour/size.
- Place selected grains between two soda glass slides.
- Apply pressure and move one slide over the other in a reciprocating motion for 10 s.
- If the glass surfaces show scratches after the test, the abrasive is considered to have a minimum hardness of Mohs 6.
Test report must include:
- Product identification (referencing the appropriate ISO 11126 part when applicable).
- Reference to ISO 11127-4:2020, test result (pass/fail), any deviations, unusual observations, test date and tester identity.
Limitations: This is a qualitative pass/fail screening; it does not provide accurate hardness values.

Practical applications and users

Quality control and QA/QC labs in abrasive manufacturing and blasting service companies.
Paint, coatings and surface preparation specifiers who need to verify abrasive suitability.
Contractors and inspectors validating incoming batches of non‑metallic abrasives (e.g., garnet, olivine, slags).
Procurement teams requiring simple acceptance tests to ensure abrasives meet minimum hardness to achieve effective blast cleaning and coating adhesion.

Benefits: fast, low‑cost screening to avoid soft abrasives that underperform, ensure consistency between batches, and support compliance with coating preparation specifications.

Related standards

ISO 11127 series - Test methods for non‑metallic blast‑cleaning abrasives (sampling, particle size, moisture, chlorides, etc.).
ISO 11126 series - Specifications and classification for non‑metallic blast‑cleaning abrasives.

Keywords: ISO 11127-4:2020, glass slide test, Mohs hardness 6, non-metallic blast-cleaning abrasives, abrasive testing, surface preparation, ISO 11126.

ISO 11127-4:2020 PDF

Технические детали

Abstract

Overview

Key topics and requirements

Practical applications and users

Related standards

Похожие стандарты

Abstract

Overview

Key topics and requirements

Practical applications and users

Related standards

Похожие стандарты

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