Corrosion Damage of Aluminum Alloy in Unsymmetric Uimethyl Hydrazine and Dinitrogen Tetroxide Liquid Propellant

Youhong Zhang,Wanlei Liu,Xinlong Chang,M Jawaid,El-R Kenawy

doi:10.1051/matecconf/20166705021

Abstract

The high strength aluminum alloy double cantilever beam (DCB) specimens were corroded under the conditions of different liquid propellant environment. After the stress corrosion exposure, the scanning electron microscopy and energy-dispersal analyses on corrosion damage were carried out. The corrosion damage sensitivity and the stress corrosion character of the LD10 high strength aluminum alloy in N 2 O 4 , UDMH and 3.5% NaCl corrosion solution were analyzed.

Highlights

LD10 aluminum alloy had been frequently used in the manufacture of complex forgings and pressure vessels used for liquid propellant stockpile [1, 2]
When the pressure vessels made in LD10 aluminum alloy are used for storing Unsymmetric Dimethyl Hydrazine (UDMH) and N2O4, it does need to endure the corrosion of propellant and other environments, and shall stand the stress in the service procedure
It is necessary to study the SCC character of the aluminum alloy served in liquid propellant environment, because of the hypertoxic character of UDMH and N2O4, the SCC experiment is very dangerous

Summary

Introduction

LD10 aluminum alloy had been frequently used in the manufacture of complex forgings and pressure vessels used for liquid propellant stockpile [1, 2]. When the pressure vessels made in LD10 aluminum alloy are used for storing UDMH and N2O4, it does need to endure the corrosion of propellant and other environments, and shall stand the stress in the service procedure. It is necessary to study the SCC character of the aluminum alloy served in liquid propellant environment, because of the hypertoxic character of UDMH and N2O4, the SCC experiment is very dangerous. There are still no SCC experiment reports in UDMH and N2O4 environment, and there are only limited documents about of the material corrosion study in liquid propellant environment. This paper presented the experimental study on the corrosion damage and SCC behaviors on LD10 aluminum alloy structure. A preliminary analytic conclusion, which consists of corrosion damage configuration, corrosion evolution rhythm and corrosion crack growth was proposed

Experimental Work

Results and Discussion

Conclusions