Cathodic protection of structures - Concrete Repair - page 112

histories on a very wide range of structures. However, they require specialist
knowledge from the designer and the installer.
They must be used with great care and careful selection on prestressed
structures, those with ASR, those with epoxy coated rebars, epoxy injections
or those with poor electrical continuity. A properly designed installed and
operated system will provide long-term control of reinforcement corrosion.
Galvanic cathodic protection is a newer process but is expanding rapidly.
It is simpler to install as it needs no power supply. However this makes
monitoring more difficult and therefore it is harder to comply with the
standards. The absence of monitoring makes it less expensive to run, but
equally it is less clear when the system is no longer effective.
References
AS 2832.5 (2002) Australian Standard™ cathodic protection of metals. Part 5: Steel
in concrete structures. Standards Australia, NSW Australia.
Broomfield, J.P. (2007) Corrosion of Steel in Concrete: Understanding, Investigation
and Repair - 2nd edition. London: Taylor and Francis; 2007.
BS EN 12696 (2000) 'Cathodic Protection of Steel in Concrete', British Standards
Institute, London.
BS EN 15257 (2006) 'Cathodic Protection - Competence Levels and Certification of
Cathodic Protection Personnel'. British Standards Institute, London.
Kessler, R.J., Powers, R.G. and Lasa, L.R. (1995) 'Update on sacrificial anode
cathodic protection of steel reinforced concrete structures in seawater', Corrosion
95, Paper 516 , NACE International, Houston, TX.
Kessler, R.J., Powers, R.G., and Lasa, I.R. (2002) ' An update on the long term use
of cathodic protection of steel reinforced concrete marine structures'. NACE
Corrosion 2002 . Paper No. 02254.
Mears, R.B. and Brown, R.H. (1938) ' A theory of cathodic protection' , Trans.
Electrochemical Society, 74, 519-531.
NACE (2001) State-of-the-Art Report: Criteria for Cathodic Protection of Prestressed
Concrete Structures . NACE Report. 2002. NACE International. Houston, TX.
RP 02900 (2000) Impressed Current Cathodic Protection of Reinforcing Steel in
Atmospherically Exposed Concrete Structures . NACE International. Houston, TX.
Bibliography
Broomfield, J.P. (2000) The Principles and Practice of Galvanic Cathodic Protection
for Reinforced Concrete Structures . Corrosion Prevention Association. Technical
Note 6.
Broomfield, J.P. and El-Belbol, S. (2006) Impressed Current Anodes for the Cathodic
Protection of Atmospherically Exposed Reinforced Concrete . Corrosion Prevention
Association, Technical Note 11.
NACE. Sacrificial Cathodic Protection of Reinforced Concrete Elements, A State-of-
the-Art Repor t. NACE International. Houston, TX.