Potential Measurements

Recording of structure-to-soil potentials to verify corrosion protection levels in pipelines and tanks.

Pipeline Integrity

Hydrogen Embrittlement: The One Thing Cathodic Protection Makes Worse

Aug 19, 2026

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10 min read

Hydrogen Embrittlement: The One Thing Cathodic Protection Makes Worse

Article 0076 — The number I gave our crews for years was right. The reason I gave for it was wrong, and the difference matters more than I expected.

Michael Roberts, +1

Cathodic Protection

Aug 4, 2026

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10 min read

Remote Earth Is Not a Distance

Article 0074 — It is a condition, not a number of feet. You find it with a voltmeter, it moves with the current crossing the pipe, and the place it hides is the one place you most need it.

Michael Roberts, +1

Pipeline Integrity

DC Interference vs. DC Influence: Know the Difference Before You Bond

Jul 6, 2026

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10 min read

DC Interference vs. DC Influence: Know the Difference Before You Bond

Article 0071 A foreign CP system can shift your readings without exchanging any current with your pipe. Interference damages steel; influence damages data. Test before you bond.

Michael Roberts, +1

External Coupons

May 29, 2026

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10 min read

Mixed Metal Potentials

Article 0065 When the voltmeter reads protection but the steel is still corroding — and how the composite reading hides what's actually happening at the pipe.

Michael Roberts, +1

External Corrosion

Over-Protection: When More Cathodic Protection Becomes the Problem

May 10, 2026

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6 min read

Over-Protection: When More Cathodic Protection Becomes the Problem

Article 0062 When CP is Pushed Past its Upper Limit

Michael Roberts, +1

Cathodic Protection

May 3, 2026

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8 min read

Testing Electrical Isolation

Article 0060 Why the Ohmmeter Lies - and What to Use Instead

Michael Roberts, +1

Reference Electrodes

Close Interval Survey - The Making Of A Great Technician

Apr 11, 2026

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12 min read

Close Interval Survey - The Making Of A Great Technician

Article LJM 005 What is CIS?

Levi McCullough

Pipeline Integrity

Drainage Bond Sizing: The Calculation Behind the Mitigation

Apr 9, 2026

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9 min read

Drainage Bond Sizing: The Calculation Behind the Mitigation

Article 0053 Drainage Bond Sizing: The Calculation Behind the Mitigation

Michael Roberts, +1

Pipeline Integrity

Apr 5, 2026

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9 min read

Current Span Test Stations

Article 0052 The Pipe as Its Own Shunt

Michael Roberts, +1

Pipeline Integrity

Stray Current: The Corrosion Problem That Isn't Yours — Until It Is

Mar 31, 2026

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7 min read

Stray Current: The Corrosion Problem That Isn't Yours — Until It Is

Article 0050 When the Current on Your Pipeline Belongs to Someone Else

Michael Roberts, +1

Corrosion Inspection

Mar 23, 2026

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5 min read

Hotspot Surveys - Muy Caliente!

Article LJM 004 What is a Hotspot Corrosion Survey?

Levi McCullough

Cathodic Protection

Mar 15, 2026

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5 min read

Evaluating Galvanic Anode Beds

Article 0043 Evaluating a Galvanic Anode Bed on a Pipeline: A Guide for Corrosion Field Technicians

Michael Roberts, +1

Cathodic Protection

Setting A Current Interrupter - Fun Stuff

Mar 11, 2026

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5 min read

Setting A Current Interrupter - Fun Stuff

Article LJM 003 Interrupting a CP Rectifier

Levi McCullough

Reference Electrodes

Mar 3, 2026

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6 min read

Reference Cells - They're Pretty Cool

Article LJM 002 Types, Applications, and Maintenance of Reference Cells

Levi McCullough

External Corrosion

Understanding Shielding and Its Impact on CP

Mar 1, 2026

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5 min read

Understanding Shielding and Its Impact on CP

Article 0037 Shielding and Its Impact on Cathodically Protected Metallic Structures

Michael Roberts, +1

Pipeline Integrity

Feb 22, 2026

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4 min read

Telluric Currents

Article 0034 Telluric Currents and Their Impact on Cathodic Protection Systems

Michael Roberts, +1

Pipeline Integrity

Feb 2, 2026

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8 min read

What is the Nernst Equation?

Article 0026 Understanding the Basics of the Nernst Equation

Michael Roberts, +1

Pipeline Corrosion

Jan 11, 2026

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6 min read

Mixed Metal Potentials

Article 0020 Accurate CP Potentials and Interpretation

Michael Roberts, +1

Pipeline Corrosion

Jan 4, 2026

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6 min read

Current Requirement Testing

Article 0018 How to Complete a Current Requirement Test: A Guide for Corrosion Technicians

Michael Roberts, +1

Corrosion Inspection

Jan 2, 2026

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5 min read

The Area Effect in Galvanic Corrosion

Article 0017 Why Anode and Cathode Size Ratios Drive Failure Rates

Michael Roberts, +1

Pipeline Integrity

Jan 1, 2026

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8 min read