UNCLASSIFIED 



Security Classification 



DOCUMENT CONTROL DATA - R&D 



(Sacurlly claasHlcatlon ot title, body ol abstract and indexing ennolation irtuBt be entered when the overall report i» claetlllad) 



\ ORIGINATING ACTIUJTY (Corporate author) 



U. S. Naval Civil Engineering Laboratory 

 Port Hueneme , California 93041 



2a REPORT SECURITY CLASSIFICATION 



Unclassified 



2b GROUP 



3 REPORT TITLE 



Corrosion of Materials in Hydrospace. Part II - Nickel and Nickel Alloys 



4- DESCRIPTIVE NOTES (Type ot report and Inclusive dales) 



S- AUTHORCS; (Laal name. Ural name, initial) 



Reinhart, Fred M. 



6. REPO RT DATE 



August 1967 



TOTAL NO. OF PASES 



65 



76. NO. OF REFS 



14 



8a. CONTRACT OR GRANT 



6. PROJECT NO. Y-F015-01-05-002A 



ORIGINATOR'S REPORT NUMBERfS; 



Technical Note N-915 



96. OTHER REPORT NO(S) (Any other t 

 tflis report) 



n6erc tfiaf may be aaal^td 



10. AVAILABILITY/LIMITATION NOTICES 



Each transmittal of this document outside the agencies of the U. S. 

 Government must have prior approval of the U. S. Naval Civil Engineering 

 Laboratory. 



II. SUPPLEMENTARY NOTES 



12. SPONSORING MILITARY ACTIVITY 



Naval Facilities Engineering Command 

 Washington, D. C. 20390 



IS. ABSTRACT 



A total of 635 specimens of 75 different nickel alloys were exposed at two 

 different depths in the Pacific Ocean for periods of time varying from 123 to 

 1064 days to determine the effects of deep ocean environments on their corrosion 

 resistance. 



Corrosion rates, types of corrosion, pit depths, effects of welding, stress 

 corrosion cracking resistance, changes in mechanical properties and analyses of 

 corrosion products of the alloys are presented. 



Of those alloys tested, the following were practically immune to corrosion: 

 nickel- chromium- iron alloy 718; nickel- iron-chromium alloys, except 902; nickel- 

 chromium-molybdenum alloys; nickel- cobalt-chromium alloy; nickel-chromium-iron- 

 molybdenum alloys; nickel-chromium-cobalt alloy; and nickel-molybdenum-chromium 

 alloy. Alloys attacked by uniform or general corrosion were the cast nickel- 

 copper alloys; nickel-molybdenum- iron alloy; and nickel-molybdenum alloy. Alloys 

 attacked by crevice or pitting corrosion were the nickels; wrought nickel-copper 

 alloys; nickel-chromium-iron alloys except 718; nickel- iron-chromium alloy 902; 

 nickel-tin-zinc alloy; nickel-beryllium alloy; nickel-chromium alloys; and nickel- 

 silicon alloy. 



Corrosion resistance of welds in the nickel alloys, depends upon the selec- 

 tion of the proper welding electrodes. The nickel alloys were not susceptible to 

 stress corrosion cracking. Corrosion products consisted of oxides, hydroxides, 

 chlorides and oxychlorides. Mechanical properties of thf> alloys were not 

 adversely affected in a significant way. 



DO .^fK. 1473 



0i0t-»07-S800 



UNCLASSIFIED 



'Securitv Classificatioii 



