BS ISO 8502-15:2020 pdf free.Preparation of steel substrates before application of paints and related products – Tests for the assessment of surface cleanliness,Extraction of soluble contaminants for analysis by acid extraction.
BS ISO 8502-15 This document specifies a method of extracting, for analysis, acid soluble contaminants from a surface by use of flexible cells in the form of adhesive patches or sleeves which can be attached to any surface,regardless of its shape (flat or curved) and its orientation (facing in any direction, including downwards).The described method is suitable for use in the field to determine the presence of acid soluble contaminants before painting or a similar treatment.This document does not cover the subsequent analysis of the contaminants that have been dissolved off.Methods of analysis suitable for field use are described in other parts of ISO 8502 such as ISO 8502-5.This document is similar in procedure to, but not equal to, ISO 8502-6. The main difference is the solvent used and the subsequent analysis that can be performed on the extraction solution.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.ISO 554, Standard atmospheres for conditioning and/or testing一Specifications ISO 8501-1, Preparation of steel substrates before application of paints and related products – Visual assessment of surface cleanliness一Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings ISO 8503-2, Preparation of steel substrates before application of paints and related products一Surface roughness characteristics of blast-cleaned steel substrates一Part 2: Method for the grading of surface profile of abrasive blast-cleaned steel一Comparator procedure ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories.Mildly acidic solutions, with pH 3,6 土0,3 shall be used to dissolve the contaminants. The method of analyses after extraction and the solvent shall be selected properly. The mildly acidic solutions shall not contain the ion(s) of interest (e.g. chloride, sulfate, nitrate] or an acid that interferes with the titration analysis, such as phosphoric acid.BS ISO 8502-15 pdf download.