ISO 11125-9:2021 塗料および関連製品を塗布する前の鋼基板の準備—金属ブラスト洗浄研磨剤の試験方法—パート9：摩耗試験と性能 | ページ 2

Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, 2 (see www.iso.org/directives ).

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This document was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 12, Preparation of steel substrates before application of paints and related products.

A list of all parts in the ISO 11125 series can be found on the ISO website.

Introduction

This document is a part of the ISO 11125 series that specifies test methods for metallic blast-cleaning abrasives.

During blast-cleaning, metallic abrasives are subjected to repeated impacts on the substrate to be prepared. These mechanical impacts result in abrasive material fatigue until particles breakdown.

The service life of the metallic blast-cleaning abrasives is influenced by:

• the type of abrasive, in particular, its size and shape, its resilience, its hardness and its internal defects;
• the hardness and the surface conditions of the substrate to be prepared;
• the blasting machine and its settings.

The principle of an abrasive service life testing machine is based on a high number of impacts between a representative sample of the abrasive to be tested and a given target.

Several testing machines exist on the market and depending on their design, the service life obtained under laboratory conditions may or may not be comparable to field operation.

It is important that the user is aware of the different parameters and the respective adjustability. The parameters of the testing machines can vary from one machine to another and therefore can result in different test results.

In general, the effect of wear and consumption are tested. Special arrangements may be required for specific test procedures. The results can be used for comparison purposes (quality inspection) or for monitoring (quality control) of the deliveries for uniformity.

1 Scope

This document specifies three procedures to test the service life of a blast-cleaning abrasive under laboratory conditions.

The performance of an abrasive is also measured by its ability to clean, via transmission of kinetic energy to the substrate in the blasting process. This document also specifies the procedures that can be performed in the same testing machines to help evaluate abrasive performance under laboratory conditions.

This document applies to the testing of virgin metallic blasting media in the delivery state by centrifugal blasting under laboratory conditions.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 11124-3, ISO 11124-4, ISO 11124-5, ISO 11125-1, ISO 11125-2, ISO 11125-3, ISO 11125-4, ISO 11125-5, ISO 11125-6, ISO 11125-7, ISO 12944-4 and the following apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

Bibliography