NACE RP 0285 was reaffirmed, modified, and eventually re-designated as (where "SP" stands for Standard Practice). The latest revision includes changes to:
This is arguably the most critical technical section, defining the quantifiable metrics for success. A fundamental criterion is achieving a negative (cathodic) polarized potential of at least 850 millivolts (mV) relative to a saturated copper/copper-sulfate reference electrode (CSE). Another key criterion is achieving a minimum of 100 mV of cathodic polarization . These criteria provide a measurable target for system design and performance validation.
Purchase the official, verified PDF directly from the AMPP Store. Then, use it to design, monitor, and maintain cathodic protection systems that truly protect your buried and submerged liquid storage assets for decades. nace rp 0285 pdf verified
Unlike massive pipelines that are built with coatings and cathodic protection from day one, most underground storage tanks were installed without corrosion protection prior to the 1980s. This standard became the "rulebook" for retrofitting protection onto existing tanks to prevent environmental disasters.
The foundational scientific benchmarks (the rules) used to evaluate system efficacy. NACE RP 0285 was reaffirmed, modified, and eventually
To confirm an underground tank is properly protected, CP technicians perform structure-to-soil potential measurements using a copper/copper-sulfate (
Covers practical field guidelines, including handling anodes safely, splicing cables underground, and properly backfilling trenches with low-resistance coke breeze. Another key criterion is achieving a minimum of
This method utilizes highly active sacrificial metals (such as magnesium or zinc) physically attached to the UST. These anodes corrode instead of the steel tank. NACE RP0285 dictates the spacing, depth, and wiring configurations required for these systems to operate autonomously.