The Chemical Nature of Aluminum Corrosion. I. Activation of Aluminum Surfaces by Aluminum Salts.

Sotoudeh, K.; Foley, R. T.; Brown, B. F.

The Chemical Nature of Aluminum Corrosion. I. Activation of Aluminum Surfaces by Aluminum Salts.

Active / Technical Report | Accession Number: ADA079351 |

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Abstract:

The activation of aluminum surfaces alloys 1199-H14 and 7075-T6 by solutions of AlNO33, AlBr3, AlCl3, Al2 SO42, AlClO43, AlI3, and NaCl of various concentrations has been measured. Experiments were also conducted in saturated solutions of aluminum acetate, benzoate, phosphate, chromate and fluoride. The dissolution rate of the alloys varies considerably with the salt, the nitrate and iodide being most aggressive. The corrosion rate in sulfate solutions is much less than the rate in bromide, chloride, or perchlorate. The pH of the various salt solutions is not the determining parameter but for a given salt AlCl the corrosion rate increases with decrease in pH. The experiments definitely demonstrate that the activation effect is not restricted to aluminum chloride and suggests a strong chemical effect in the pitting and stress cracking mechanism. Author

Author(s):

Sotoudeh, K. ; Foley, R. T. ; Brown, B. F.

Author Organization(s):

AMERICAN UNIV WASHINGTON DC DEPT OF CHEMISTRY

Descriptive Note:

Technical progress rept.,

Pagination:

0020

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:

Approved For Public Release

RECORD

Collection: TR

Identifying Numbers

Report Number(s):

TR-10

Contract/Grant Number(s):

N00014-75-C-0799

Subject Terms

Joint Capability Areas:

JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_1.2.3_Educating; JCA_1.2.7_Experimentation; JCA_4.6_Engineering; JCA_3.2_Engagement; JCA_3_Force Application; JCA_5_Command and Control

Communities of Interest:

Ground and Sea Platforms

Descriptor(s):

*ALUMINUM COMPOUNDS, *CORROSION, *ALUMINUM ALLOYS, *SURFACE CHEMISTRY, STRESSES, ACTIVATION, EXPERIMENTAL DATA, CRACKING(FRACTURING), RATES, CHROMATES, SURFACES, CHLORIDES, SODIUM CHLORIDE, SALTS, BROMIDES, PH FACTOR, ACETATES, PHOSPHATES, ALUMINUM SULFATE, NITRATES, PITTING, PERCHLORATES, IODIDES

Field(s)/Group(s):

Properties of Metals and Alloys, Fabrication Metallurgy

Keyword(s):

Aluminum corrosion, WUNR036106

Report Date:

1979 Nov 01