Soluble salt contamination on blast-cleaned surfaces and the effect on the durability of subsequently applied coatings
A number of coating systems were assessed using accelerated and outdoor weathering tests. Visual observations and adhesion tests were used in suggesting realistic residual surface salt levels for different coatings in three in-service conditions. The different coating systems can tolerate different maximum residual salt-levels, which for a specific coating system vary depending on the exposure conditions. Further, the proposed levels in draft ISO standards for some systems seem to be much lower than the levels established in this study. Salt deposited by either natural exposure or simulated in cabinets had a lower impact on durability compared with rubber blade wipe application (used for sample preparation in this study). This significant result was not taken into account when suggesting the limits, which can therefore be conservative. In addition, extraction/detection methods of soluble salts for use in the field and surface cleaning methods were investigated and recommendations are made.
Bibliographic Reference: EUR 21910 EN (2005), 142pp. Euro: 25
Availability: Katalogue Number: KI-NA-21910-EN-S The paper version can be ordered online and the PDF version downloaded at: http://bookshop.europa.eu
ISBN: ISBN: 92-894-9926-5
Record Number: 200618557 / Last updated on: 2006-04-28
Original language: en
Available languages: en