Cathodic protection of concrete structures with thermally sprayed sacrificial zinc anodes—critical parameters for the protective ability of the sprayed-on anode

Author(s): Bror Sederholm, Anders Selander, Jan Trägårdh
Paper category: Conference
Book title: Concrete Repair, Rehabilitation and Retrofitting III (ICCRRR)
Editor(s): M.G. Alexander, H.-D. Beushausen, F. Dehn, P. Moyo
Print ISBN: 978-0-415-89952-9
Publisher: Taylor & Francis Group
Pages: 353- 354
Total Pages: 2
Language: English

Abstract: 
This paper presents an ongoing project regarding Cathodic protection of concrete structures with thermally sprayed sacrificial zinc anodes. The project is divided into two parts:
Stage 1 shows the results from a survey of literature and practical experiences of the use of cathodic protection of concrete structures with sprayed zinc sacrificial anodes. Results from investigations of thermally zinc sprayed concrete structures such as concrete walls in the water intake building on a nuclear plant and on the edge beam of the Öland Bridge are presented in the paper.
Stage 2 in the project is focused on the critical parameters for the protective ability of the sprayed-on anode. A laboratory setup and a field object are presented as well as the methods used to evaluate the sprayed-on anode.
The present investigations show that the resistivity of the concrete has a great influence on the protective ability of the sprayed-on anode. Further, the life length of the zinc anode depends on the external environmental conditions at the anode. In conclusion it can be stated that the prospect of using cathodic protection with thermally sprayed zinc sacrificial anodes is promising but in order to optimize the use, threshold values need to be determined regarding for example the humidity, carbonation depth and the chloride content of the concrete.

Online publication: 2014
Publication Type: abstract_only
Public price (Euros): 0.00