SIST EN ISO 22553-5:2021 Overview
SIST EN ISO 22553-5:2021, titled Paints and varnishes - Electro-deposition coatings - Part 5: Determination of sieve residue, is a standardized method developed by the International Organization for Standardization (ISO) and adopted by CEN. This standard specifies a reliable procedure for measuring sieve residue-foreign materials such as soiling matter, non-dispersed paint particles, and other contaminants-in electro-deposition coating materials. It targets electro-deposition coatings widely used across automotive, aerospace, agricultural, and various general industrial sectors.
The test aims to detect the stability and purity of coating dispersions by quantifying particles retained on a specified mesh size sieve. By identifying residues like metal particles from prior processing or coating clots, SIST EN ISO 22553-5:2021 helps prevent application issues, sedimentation, and equipment clogging during coating processes.
Key Topics
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Scope and Applicability
Covers the detection of sieve residue in electro-deposition coatings used in industries such as automotive, aerospace, agriculture, radiators, chiller units, and consumer products.
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Test Method Principle
A predefined volume of coating material is filtered through a 30 µm mesh sieve, and the retained residue is dried, weighed, and related to the volume to quantify contamination.
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Apparatus and Materials
Includes laboratory essentials such as plastic cups, mesh sieve fabric (approx. 30 µm), temperature-resistant dishes, paper clips, precision balance (1 mg accuracy), and demineralized water.
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Procedure Summary
- Dry and weigh the sieve fabric.
- Assemble the sieve fabric on cups as a filter.
- Pass a minimum of 2 liters of homogenized coating material through the sieve.
- Rinse, dry, and weigh the residue collected on the sieve.
- Calculate sieve residue per liter using the weight difference.
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Evaluation
Results are expressed in mg of residue per liter of coating material, providing a quantitative measure of non-dispersed particles or foreign matter.
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Reporting Requirements
The report must include product identification, test results, deviations from the method if any, anomalies observed, as well as test dates and references to the ISO standard.
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Standardization and Compliance
SIST EN ISO 22553-5:2021 is harmonized across numerous European countries under CEN regulations, ensuring consistent quality control and testing protocols internationally.
Applications
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Quality Control in Automotive Coatings
Ensures that e-coat bath stability and purity are maintained by detecting contamination early, thereby preventing coating defects and equipment damage.
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Industrial and Consumer Product Manufacturing
Applicable to a wide range of products including chiller units, radiators, and other industrial components requiring uniform and defect-free coatings.
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Aerospace and Agriculture
Critical for coatings subjected to stringent performance requirements, where sieve residue measurement helps maintain paint quality and durability.
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Process Optimization
Identifies sources of contamination such as metal particles introduced with objects to be coated or paint clots, enabling corrective measures in production workflows.
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Research and Development
Useful for assessing the stability of novel electro-deposition formulations and their resistance to coagulation or sedimentation under various stress conditions.
Related Standards
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ISO 4618 - Paints and varnishes - Terms and Definitions: Provides terminology relevant to paints and coatings, including key definitions used in SIST EN ISO 22553-5:2021.
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ISO 22553-1 - Electro-deposition coatings - Part 1: Vocabulary: Defines specific nomenclature for electro-deposition coatings, ensuring clarity and consistency in communication.
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ISO 23321 - Solvents for paints and varnishes - Demineralized water for industrial applications: Specifies the quality of demineralized water required during the sieve residue test procedure.
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Additional Parts of ISO 22553 Series
Other parts of the ISO 22553 series provide comprehensive guidelines covering various test methods and quality assessments for electro-deposition coatings.
SIST EN ISO 22553-5:2021 is an essential standard for professionals and quality engineers working in coatings and surface treatment industries. Its focus on measuring sieve residue ensures product reliability, contamination control, and process efficiency across multiple sectors. Adopting this method supports adherence to international quality benchmarks and enhances end-product performance in electro-deposition applications.