must be measured between the tank structure and a stable copper-copper sulfate reference electrode (CSE) contacting the soil. To eliminate errors caused by voltage drops ( IRcap I cap R

To maintain compliance, the CP system must be surveyed periodically to ensure the protection criteria are met. The standard outlines testing frequency and procedures. Scope and Application

The area of the metal where no corrosion occurs and current enters the metal. Electrolyte: The soil surrounding the tank. Metallic Path: The tank structure itself.

Finding a document is crucial for engineers, inspectors, and facility owners to ensure they are using the correct, compliant procedures. What is NACE RP0285/SP0285?

Corrosion is the primary threat to the structural integrity of Underground Storage Tank (UST) systems. When steel tanks and piping corrode, they risk leaking hazardous substances into the soil and groundwater. To mitigate this risk, the National Association of Corrosion Engineers (NACE)—now part of AMPP (Association for Materials Protection and Performance)—developed the Recommended Practice .

The key to obtaining the correct document lies in understanding this change and the history of the standard:

To guarantee your copy is authentic, authorized, and up to date, utilize legitimate industry repositories.

The standard is a critical guideline for the corrosion control of underground storage tank (UST) systems using cathodic protection. While many users search for "NACE RP 0285 PDF verified," it is essential to note that the "RP" (Recommended Practice) designation was later updated to "SP" (Standard Practice). The most current and verified version is NACE SP0285-2021 , issued by NACE International (now part of AMPP). Overview of NACE RP 0285 (SP 0285)

of cathodic polarization between the tank structure and the reference electrode. This is measured by determining the difference between the "Instant-Off" potential and the fully depolarized (native) potential of the steel after the CP system has been turned off and allowed to settle. 5. Inspection, Testing, and Maintenance Requirements

The system is considered protected if there is a minimum of

: Existing bare and coated mild steel tanks, as well as new coated steel tanks. Components

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