MIL-HDBK-1004/10
Page
10.10
Impressed Current Rectifier Installation. . . . . . . . . . .
225
11.1
Introduction. . . . . . . . . . . . . . . . . . .
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229
11.2
Initial Potential Survey. . . . . . . . . . . . .
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229
11.3
Detection and Correction of Interference. . . . .
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229
11.4
Adjustment of Impressed Current Systems. . . . .
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229
11.4.1
Uneven Structure-To-Electrolyte Potentials. . . .
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229
11.4.2
Rectifier Voltage and Current Capacity. . . . . .
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230
11.5
Adjustment of Sacrificial Anode Systems. . . . .
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230
11.5.1
Low Anode Current Levels. . . . . . . . . . . . .
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230
11.5.2
Inadequate Protection at Designed Current Levels
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230
12.1
Introduction. . . . . . . . . . . . . . . . .
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231
12.2
Required Periodic Monitoring and Maintenance.
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231
12.3
Design Data Required for System Maintenance.
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231
12.3.1
Drawings. . . . . . . . . . . . . . . . . . .
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231
12.3.2
System Data. . . . . . . . . . . . . . . . .
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231
12.3.2.1 Design Potentials. . . . . . . . . . . . . .
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231
12.3.2.2 Current Output. . . . . . . . . . . . . . . .
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231
12.3.2.3 System Settings and Potential Readings. . . .
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231
12.3.2.4 Rectifier Instructions. . . . . . . . . . . .
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232
12.4
Basic Maintenance Requirements. . . . . . . .
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232
12.5
Guidance for Maintenance . . . . . . . . . .
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232
12.5.1
Agency Maintenance and Operations Manuals. .
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232
12.5.2
DOT Regulations. . . . . . . . . . . . . . .
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235
12.5.3
NACE Standards. . . . . . . . . . . . . . . .
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235
13.1
Importance of Economic Analysis. . . . . . . .
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237
13.2
Economic Analysis Process. . . . . . . . . . .
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237
13.2.1
Define the Objective. . . . . . . . . . . . . .
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237
13.2.2
Generate Alternatives. . . . . . . . . . . . .
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238
13.2.3
Formulate Assumptions. . . . . . . . . . . . .
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238
13.2.4
Determine Costs and Benefits. . . . . . . . . .
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238
13.2.4.1 Costs. . . . . . . . . . . . . . . . . . . . .
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238
13.2.4.2 Benefits. . . . . . . . . . . . . . . . . . . .
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239
13.2.5
Compare Costs and Benefits and Rank
Alternatives.
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239
13.2.6
Perform Sensitivity Analysis. . . . . . . . . .
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239
13.3
Design of Cathodic Protection Systems. . . . .
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239
13.4
Economic Analysis - Example 1 . . . . . . . . .
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240
13.4.1
Objective. . . . . . . . . . . . . . . . . . .
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240
13.4.2
Alternatives . . . . . . . . . . . . . . . . .
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240
13.4.3
Assumptions . . . . . . . . . . . . . . . . . .
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240
13.4.4
Cost/Benefit Analysis . . . . . . . . . . . . .
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240
13.4.4.1 Cost - Alternative 1--Steel Line Without
Cathodic Protection. . . . . . . . . . . . . .
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240
13.4.4.2 Cost - Alternative 2--Steel Line with Cathodic
Protection. . . . . . . . . . . . . . . . . . .
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242
13.4.4.3 Cost - Alternative 3--Plastic Line. . . . . . .
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242
13.4.4.4 Benefits. . . . . . . . . . . . . . . . . . . .
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243
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