INHERENT CORROSION RESISTANCE AND RESPONSE TO CATHODIC PROTECTION IN SEAWATER OF RECENTLY DEVELOPED STAINLESS STEEL ALLOYS

Stainless steel alloys (24Ni-20Cr-6.5Mo, 26Cr-1MO, 22Cr- 13Ni-5Mn, and Type 216 stainless steel) were studied for inherent corrosion resistance in quiescent and slowly moving seawater. The response of these alloys to two levels of cathodic protection (mild steel and zinc anodes) was also studied. None of the alloys was completely resistant to corrosion. Most were quite susceptible to crevice corrosion, but two unprotected specimens of 24Ni-20Cr-6.5Mo stainless steel had excellent resistance in both exposure conditions. These specimens exhibited relatively noble freely corroding electrochemical potentials over an extended period. Cathodic protection with either mild steel (Fe) or zinc (Zn) anodes prevented crevice corrosion, but the 26Cr-1Mo and 22Cr-13Ni-5Mn stainless steels showed some edge corrosion and corrosion under the mild steel anode, respectively, when polarized to the potential of mild steel. (Author)

• Corporate Authors:

  Naval Research Laboratory

  4555 Overlook Avenue, SW
  Washington, DC  United States  20375-5320
• Authors:
  • Lennox Jr, T J
  • Peterson, M H
• Publication Date: 1976-8-4

Media Info

• Pagination: 24 p.

Subject/Index Terms

• TRT Terms: Cathodic protection; Corrosion; Corrosion protection; Corrosion resistance; Stainless steel
• Old TRIS Terms: Crevice corrosion
• Subject Areas: Construction; Marine Transportation;

Filing Info

• Accession Number: 00147772
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NRL-8016 Final Rpt.
• Files: TRIS
• Created Date: Feb 16 1977 12:00AM