Corrosion problems associated with space vehicles, in general, are discussed as contrasted to those problems experienced with structures in an earth atmosphere. Primary emphasis is placed on structural alloys in this discussion, although some corrosion failures experienced in various mechanical components are described. General corrosion prevention measures are indicated, and solutions to specific corrosion failures described. Major failures experienced have been attributed to stress corrosion cracking, rather than general or galvanic type corrosion. Most such failures have occurred with only five different materials: three aluminum alloys - 7075-T6, 7079-T6, and 2024-T6; and two precipitation hardening stainless steels - 17-7PH and AM 355. Corrective actions were different in each case, but involved either a complete change to another material, a change to a different temper of the same alloy, or a modification of the heat treatment and/or general processing techniques. General conclusions are that the types of failures described could be avoided by: a more suitable selection of alloys in the initial design, a realistic review of the environments that could be encountered in the service lifetime of the component, lowering stresses, improving process controls, and effecting better familiarization of design personnel with the with the overall stress corrosion problem in an effort to reduce human error.; Preprint 18e.; Materials for re-entry and spacecraft systems - spacecraft materials.; Materials Conference, Philadelphia, Pennsylvania, March 31 - April 4, 1968.
8 x 10 inch black and white photograph. A photograph of a list of things contributing to stress corrosion. Referenced by "Materials in Space Exploration." Is part of envelope containing photos accompanying C. E. Cataldo paper "Materials in Space Exploration."
8 x 10 inch black and white photograph; This is a cutaway drawing of the bulkhead with information about the LH2 tank skin, insulation, Aft LOX bulkhead, 2014-T6 alum skin and fiberglass core. Part of an envelope with photos accompanying C. E. Cataldo paper "Materials in Space Exploration."
8 x 10 inch black and white photograph.; Drawing contains information about the modified epoxy adhesive, aluminum film, mylar film, perforated phenolic honeycomb core, tank skin, mylar honeycomb core, polyurethane adhesive, weight and thermal conductivity.; Photo negative no. 651746 M-268.
This paper presents a general review of major structural alloys that have been used in liquid rockets and space vehicles, the current state-of-the-art as applied to the Apollo launch vehicle systems, and discusses some materials currently under development for future requirements in vehicles for space exploration. Some aspects of the importance of corrosion resistant materials and suitable protective measures are discussed, as applied to both flight hardware and associated ground support equipment.