5. Inspection of coatings

5.1 Upon application

In this article, we have demonstrated multiple times that one of the predominant factors behind the appearance of defects is the poor application of systems on site. Indeed, applicators need to deal with environmental conditions that can be unfavourable; these might include weather conditions (rain, damp, wind, etc.), structural operating conditions (as in the case of coating rehabilitation on a pipeline transporting gas), the quality of preparation of the work route or excavation. It is therefore necessary for the hiring firm to supervise the works. An applicator certification scheme to guarantee the quality of application, whether for the completion of new structures or the rehabilitation of existing networks, is currently being finalised.

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Inspection of coatings

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Coating defects

Bibliographical sources

(1) - BAROUX (B.) - La corrosion des métaux, passivité et corrosion localisée . - Dunod (2014).
(2) - BERANGER (G.), MAZILLE (H.) - Corrosion et anticorrosion, pratique industrielle ....

Norms and standards

Paints & Varnishes – Corrosion protection of steel structures by protective paint systems - ISO 12944-5 - 2018
Preparation of steel substrates before application of paints and related products – Visual assessment of surface cleanliness – Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coating - ISO 8501-1 - 2007
Petroleum...

Regulations

Articles L. 555-1 to L. 555-30 of the French Environmental Code

Articles R. 555-1 to R. 555-52 of the French Environmental Code

GESIP technical guides

Decree of 5 March 2014 defining arrangements for the application of Chapter V of Part V of Book V of the Environmental Code including regulations on the safety of pipelines for the transport of natural...