NBN ISO 11124-7:2025

Preparation of steel substrates before application of paints and related products — Specifications for metallic blast-cleaning abrasives — Part 7: High chromium white cast iron grit ()

ACTIVE

About this standard

Languages
English
Type
NBN
Standards committee
ISO/TC 35/SC 12 (Preparation of steel substrates before application of paints and related products)
Status
ACTIVE
Publication date
28 August 2025
ICS Code
25.220.10 (Surface preparation)
Withdrawn Date
Price
€ 40,00

About this training

Summary

< p class=" MsoBodyText" style=" mso-layout-grid-align: none text-autospace: none " > < span lang=" EN-GB" style=" mso-bidi-font-size: 12.0pt " > This document specifies requirements for high chromium white cast iron grit, as supplied for blast-cleaning processes. It specifies ranges of particle sizes, together with corresponding grade designations. Values are specified for hardness, density, defect/ structural requirements, metallographic structure and chemical composition.< / span>


< p class=" MsoBodyText" style=" mso-layout-grid-align: none text-autospace: none " > < span lang=" EN-GB" style=" mso-bidi-font-size: 12.0pt " > The requirements specified in this document apply to abrasives supplied in the new condition only. They do not apply to abrasives either during or after use.< / span>


< p class=" MsoBodyText" style=" mso-layout-grid-align: none text-autospace: none " > < span lang=" EN-GB" style=" mso-bidi-font-size: 12.0pt " > High chromium white cast iron grits are used in both static and site blasting equipment. They are most often selected where there is a possibility for the recovery and re-use of the abrasive.< / span>


< p class=" Note" style=" tab-stops: 19.85pt 39.7pt 48.25pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm mso-layout-grid-align: none text-autospace: none " > < span lang=" EN-GB" style=" mso-bidi-font-size: 12.0pt " > NOTE 1 Although this document has been developed for preparation of steelwork, these materials are predominantly used for non-ferrous substrates. The properties specified will generally be appropriate for use when preparing other material surfaces, or components, using blast-cleaning techniques, and can be used for applications where no subsequent coating is applied.< / span>


< p class=" Note" style=" tab-stops: 19.85pt 39.7pt 48.25pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm mso-layout-grid-align: none text-autospace: none " > < span lang=" EN-GB" style=" mso-bidi-font-size: 12.0pt " > NOTE 2 Whenever dissimilar metals are used together, galvanic corrosion can occur.< / span>