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<title>Corrosion Prevention using Impressed Current Cathodic Protection</title>
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<p><img SRC="../Images/casebacktop.gif" width="700" height="82"> </p>

<p><span class="mainlight">Corrosion Prevention using Structural Healthcare Systems Case
No. 13</span></p>

<p><span class="header">Barr Beacon Reservoir, Walsall<br>
Monitoring and Protection of Roof Support Columns of the Underground Reservoir</span></p>

<p><img ALIGN="right" SRC="../Images/Barr%20Beacon.JPG" border="1" vspace="15" width="359"
height="247"> <span class="maindark">Year of Installation:</span><span class="main"> 1999</span><br>
<span class="maindark">Anode Used:</span><span class="main"> Ebonex® conductive ceramic
anodes</span><br>
<span class="maindark">Monitoring Used:</span><span class="main"> C-Probe CP10P and CP101</span><br>
<span class="maindark">Management System:</span><span class="main"> AchillesCP and
AchillesEDC</span><br>
<span class="maindark">Additional Treatments:</span><span class="main"> None.</span> </p>

<p><span class="mainlight">Description:</span> <br>
<span class="main">Barr Beacon is located near Perry Barr, Walsall and is one of many
underground reservoirs within the asset management scope of South Staffordshire Water PLC.</p>

<p>C-Probe was contracted to design, supply, install, commission and manage a pilot scheme
with the objective of providing a greater understanding of the behaviour of reinforced
concrete columns supporting the roof of Barr Beacon reservoir.</p>

<p>To this end a system was designed for both the East and West tanks with both cathodic
protection and early detection of corrosion systems installed to a total population of 8
columns.</p>

<p>In both tanks 2 columns were installed with the a discrete anode cathodic protection
system and 2 columns with corrosion potential and corrosion rate embedded monitoring
probes.</p>

<p>For the cathodic protection columns it was also within the scope of the design to
investigate the effectiveness of the systems installed to both 100% and 50% of the column
height. The underlying issue here was that the reservoir is filled to at least 60%
capacity all the time and rarely empty and as such the most susceptible area for corrosion
protection to be needed was likely to be at non-water saturated areas immediately below
and above the water-line.</p>

<p>The systems have been incorporated into an integrated neural network management system
managed using the C-Probe Internet interactive management system &#150; AiMS.</p>

<p>The systems have been operated successfully for over 12-months with valuable
information being achieved to predict the ongoing maintenance requirements of this
important reservoir structure.</p>
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