BS EN ISO 13129:2012:2013 Edition
$142.49
Paints and varnishes. Electrochemical measurement of the protection provided to steel by paint coatings. Current interrupter (CI) technique, relaxation voltammetry (RV) technique and DC transient (DCT) measurements
| Published By | Publication Date | Number of Pages |
| BSI | 2013 | 29 |
This International Standard specifies the procedure for evaluation of the experimental set-up of electrochemical measurements on high-impedance coated samples using methods that are based on the current interrupter (CI) technique, relaxation voltammetry (RV) or DC transient (DCT) measurements.
It provides specific definitions and guidance on optimizing the collection of CI, RV and DCT data from high-impedance systems. High impedance in the context of intact coatings refers to systems with an impedance greater than 109 Ω/cm2. This does not preclude measurements on systems with lower impedance. This International Standard deals in particular with:
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instrumental set-up: requirements and shortcomings;
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data validation: checking the measurement range and the accuracy of the data;
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performing CI, RV, DCT measurements: specimen considerations and instrumental parameters;
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the experimental results: different methods of presenting CI, RV and DCT data.
Following the recommendations should ensure the acquisition of CI, RV and DCT data that can be used to study the performance of the specimen. This International Standard does not give guidelines for the interpretation of the data.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 7 | Foreword |
| 8 | Introduction |
| 10 | 1 Scope 2 Normative references 3 Terms and definitions |
| 11 | 4 Apparatus 4.1 Faraday cage 4.2 Cell for sample, including electrode holder |
| 12 | 4.3 Galvanostat 4.4 Potentiostat 4.5 Electrodes |
| 13 | 4.6 Electrolyte 5 Specimens 5.1 Preconditioning of specimens 5.2 Environmental control 5.3 Evaluation of specimens exposed to weathering in the laboratory and in the field |
| 14 | 5.4 Number of specimens and repeatability of results 6 Experimental procedure 6.1 General 6.2 Current interrupter technique |
| 15 | 6.3 Relaxation voltammetry |
| 16 | 6.4 DC transient measurements |
| 17 | 7 Expression of results 8 Precision 9 Test report |
| 19 | Annex A (normative) Description of the dummy cell |
| 21 | Annex B (informative) Further considerations concerning measurements on coatings |
| 23 | Annex C (informative) Examples of results |
| 24 | Bibliography |
