Civil Engineering Reference
In-Depth Information
Relative
life
Relative
cost
Advantages
Limitations
Mixed metal
oxide coated
titanium mesh
- embedded
in a concrete
overlay, usually
sprayed
Very long
High
Durable
Overlay can debond if
preparation and application
is not done with great care
and expertise
Deadweight and thickness
of overlay can affect
structure
Mixed metal
oxide coated
titanium mesh
ribbon
Very long
High
Durable
No change in
dead load or
sections
Need adequate cover to
avoid short circuit from
anode to steel
Leaves stripes on surface
Mixed metal
oxide coated
titanium probe
anodes
Very long
High
Durable
No change in
dead load or
sections
Titanium link wire can pit if
voltage exceeds 8-12V.
Anodes must be positioned
to avoid short circuit from
anode to steel
Leaves stripes on surface
Requires coring or
percussive drilling to install
Conductive
ceramic probe
anodes
Very long
High
Durable
No change in
dead load or
sections
Titanium link wire can pit if
voltage exceeds 8-12V.
Anodes must be positioned
to avoid short circuit from
anode to steel
Leaves stripes on surface
Requires coring or
percussive drilling to install
Conductive
organic
coatings
Short
Low
Easy
application and
replacement
No change in
dead load or
sections
Hides repairs
and givens
choice of finish
colour and
texture
Needs dry conditions
during application and will
deteriorate rapidly in wet
conditions
Low resistance to wear and
abrasion
Thermal
sprayed zinc
Medium
Medium
Easy
application and
replacement
No change in
dead load or
sections
Moisture
tolerant
Complex application
process
