NACE SP0170-2021: "Impressed Current Cathodic Protection Systems for the Corrosion Protection of Steel Water Storage Tanks"
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NACE SP0170 is a critical Standard Practice (SP) focused on protecting austenitic stainless steels and other austenitic alloys from Polythionic Acid (PTA) Stress Corrosion Cracking (SCC) during the shutdown of refinery equipment. nace sp0170 pdf 2021
The standard provides procedures to prevent the formation of polythionic acids, which occur when oxygen and water react with sulfide corrosion products on equipment surfaces. GlobalSpec Materials & Fabrication nace sp0170 pdf 2021