MIL-HDBK-1004/10
ELECTRICAL ENGINEERING CATHODIC PROTECTION
CONTENTS
Page
1.1
Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1.2
Cancellation. . . . . . . . . . . . . . . . . . . . . . . . .
1
1.3
Related Technical Documents. . . . . . . . . . . . . . . . .
1
2.1
Corrosion as an Electrochemical Process. . . .
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3
2.1.1
Driving Force. . . . . . . . . . . . . . . . .
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3
2.1.2
The Electrochemical Cell. . . . . . . . . . . .
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3
2.1.2.1
Components of the Electrochemical Cell. . . . .
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3
2.1.2.2
Reactions in an Electrochemical Cell. . . . . .
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3
2.2
The Electrochemical Basis for Cathodic
Protection. . . . . . . . . . . . . . . . . . .
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4
2.2.1
Potentials Required for Cathodic Protection. .
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4
2.3
Practical Application of Cathodic Protection. .
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5
2.3.1
When Cathodic Protection Should Be Considered.
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5
2.3.1.1
Where Feasible. . . . . . . . . . . . . . . . .
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5
2.3.1.2
When Indicated By Experience. . . . . . . . . .
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5
2.3.1.3
As Required By Regulation. . . . . . . . . . .
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5
2.3.2
Functional Requirements for Cathodic Protection
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2.3.2.1
Continuity. . . . . . . . . . . . . . . . . . .
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8
2.3.2.2
Electrolyte. . . . . . . . . . . . . . . . . .
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8
2.3.2.3
Source of Current. . . . . . . . . . . . . . .
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8
2.3.2.4
Connection to Structure. . . . . . . . . . . .
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8
2.4
Sacrificial Anode Systems. . . . . . . . . . .
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8
2.4.1
Anode Materials. . . . . . . . . . . . . . . .
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9
2.4.2
Connection to Structure. . . . . . . . . . . .
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10
2.4.3
Other Requirements. . . . . . . . . . . . . . .
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10
2.5
Impressed Current Systems. . . . . . . . . . .
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2.5.1
Anode Materials. . . . . . . . . . . . . . . .
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10
2.5.2
Direct Current Power Source. . . . . . . . . .
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10
2.5.3
Connection to Structure. . . . . . . . . . . .
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10
2.5.4
Other Requirements. . . . . . . . . . . . . . .
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11
3.1
Introduction. . . . . . . . . . . . . . . .
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13
3.2
Electrical Criteria. . . . . . . . . . . .
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13
3.3
Interpretation of Structure-to-Electrolyte
Potential Readings. . . . . . . . . . . . .
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13
3.3.1
National Association of Corrosion Engineers
(NACE)Standard RP-01-69. . . . . . . . . .
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13
3.3.1.1
Criteria for Steel. . . . . . . . . . . . .
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15
3.3.1.2
Criteria for Aluminum. . . . . . . . . . .
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15
3.3.1.3
Criteria for Copper. . . . . . . . . . . .
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15
3.3.1.4
Criteria for Dissimilar Metal Structures. .
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15
3.3.2
Other Electrical Criteria. . . . . . . . .
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15
3.3.2.1
Criteria for Lead. . . . . . . . . . . . .
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16
3.3.2.2
NACE RP-02-85. . . . . . . . . . . . . . .
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16
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