Cathodic Protection · since 2000 Request Spec
Engineering · Insights

The CathPro
Technical Blog.

Sizing guides, standard comparisons, project case studies, and field-earned insights on cathodic protection — written by engineers who actually melt and install the anodes.

CP Design 19 April 2026
9 min read

Sacrificial Anode Sizing for Buried Pipelines: A Practical Engineer's Guide

Two core formulas, realistic end-of-life parameter tables, and a complete 12 km DN400 pipeline worked example for 20-year CP design. Covers Mg vs Al decision matrix, installation best practices, and the six sizing errors we see most often in the field.

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Coming soon May 2026

Al-Zn-In vs Al-Zn-Hg: Which Aluminum Anode for the Arabian Gulf?

Activation chemistry, indium vs mercury alloying, and why the choice matters for offshore platforms in the Persian Gulf — a pragmatic comparison with capacity, environment, and regulatory perspectives.

Coming soon TBD

DNV Type Approval for Anodes: What Auditors Actually Check

The 2-day factory audit experience, common findings, and what separates a smooth approval from a deferred one.