ISO 8503-4:2012
Preparation of steel substrates before application of paints and related products — Surface roughness characteristics of blast-cleaned steel substrates — Part 4: Method for the calibration of ISO surface profile comparators and for the determination of su
ISO 8503-4:2012 specifies the stylus instrument and describes the procedure for calibrating ISO surface profile comparators conforming to the requirements of ISO 8503-1.
It is also applicable to the determination of the surface profile, within the range 20 μm to 200 μm, of essentially planar blast-cleaned steel. The determination can be carried out on a representative section of the blast-cleaned surface or, if direct observation of the surface is not feasible, on a replica of the surface.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Test surfaces
6.1 ISO surface profile comparator
6.2 Blast-cleaned steel substrates/replica
7 Procedure for measurement of maximum peak-to-valley height, Ry
8 Calculation and expression of results
9 Test report
Annex A (normative) Test report for the calibration of ISO surface profile comparators and for the determination of surface profiles
Annex B (normative) Form for recording surface profile measurements made in accordance with ISO 8503‑4
Annex C (informative) Guidance notes for the preparation and measurement of replicas
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Test surfaces
6.1 ISO surface profile comparator
6.2 Blast-cleaned steel substrates/replica
7 Procedure for measurement of maximum peak-to-valley height, Ry
8 Calculation and expression of results
9 Test report
Annex A (normative) Test report for the calibration of ISO surface profile comparators and for the determination of surface profiles
Annex B (normative) Form for recording surface profile measurements made in accordance with ISO 8503‑4
Annex C (informative) Guidance notes for the preparation and measurement of replicas
Bibliography