Title

The Development Of Multifunctional Corrosion Inhibitors For Aerospace Applications

Report Number

AFWAL-TR-81-4019 Volume II p. 345-384

Creator

Khobaib, M.

Vahldiek, F. W.

Lynch, C. T.

Corporate Author

Systems Research Laboratories, Inc.

Air Force Wright Aeronautical Laboratories, Materials Laboratory (AFWAL/MLLN)

Laboratory

Materials Laboratory

Date

1980

Date Issued

1980-11

Extent

40

Identifier

ADA115875

Abstract

The development of inhibitors for aerospace applications such as automated rinsing of aircraft requires systems of high solubility, low toxicity, and reasonable cost which are effective on a wide variety of high-strength corrosion-
susceptible alloys. Chromate-based products, in combination with polyphosphates, have been reasonably effective against corrosion of ferrous and nonferrous
metals and alloys and are presently the most widely used inhibitors. The use of chromates, however, has been the subject of ecological concern, and the present investigation involves the development of non-toxic, multifunctional water-soluble inhibitors. The performance of a large number of nonchromate inhibitors
has been studied and a borax-nitrite-based formulation developed which inhibits the corrosion of both ferrous and nonferrous alloys. This formulation consists
of a combination of low-toxicity components and is effective in preventing localized corrosion and accelerated crack growth as well as general corrosion.
Effectiveness in aggressive environments including synthetic urine has been demonstrated. Applications include lower-bay, galley, and related areas of large aircraft and automated aircraft rinse facilities. Field evaluations are
underway.

Distribution Classification

1

Distribution Conflict

No

DTIC Record Exists

No

Illinois Tech Related

No

Photo Quality

Complete

Report Availability

Full text available

Type

article

Is Part Of

Proceedings of the 1980 Tri-Service Conference on Corrosion Volume II