Effect Of A Simulated Space Environment On Sulfuric Acid Anodized Aluminum For Spacecraft Thermal Control

1989 ◽  
Author(s):  
Huong G. Le ◽  
Charles A. Smith ◽  
Dudley L. O'Brien
Keyword(s):  
Sulfuric Acid ◽  
Thermal Control ◽  
Space Environment ◽  
Anodized Aluminum ◽  
Spacecraft Thermal Control

DETERMINING THERMAL RESISTANCE IN THE MODEL OF THE LIQUID CIRCUIT OF SPACECRAFT THERMAL CONTROL SYSTEM

2019 ◽  
Vol 20 (3) ◽  
pp. 366-374
Author(s):  
Yu. N. Shevchenko ◽  
◽  
A. A. Kishkin ◽  
F. V. Tanasiyenko ◽  
O. V. Shilkin ◽  
...  
Keyword(s):  
Control System ◽  
Thermal Resistance ◽  
Thermal Control ◽  
Thermal Control System ◽  
Spacecraft Thermal Control

Development of a Bearingless Ammonia Pump for Spacecraft Thermal Control

2008 ◽  
Author(s):  
R. W. Baldauff ◽  
T. Kawecki ◽  
W. Purdy ◽  
T. T. Hoang
Keyword(s):  
Thermal Control ◽  
Spacecraft Thermal Control

scholarly journals Corrosion Behavior of AA 1100 Anodized in Gallic-Sulfuric Acid Solution

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 405
Author(s):  
Marlon L. Mopon ◽  
Jayson S. Garcia ◽  
Dexter M. Manguerra ◽  
Cyril John C. Narisma
Keyword(s):  
Corrosion Resistance ◽  
Sulfuric Acid ◽  
Acid Solution ◽  
Gallic Acid ◽  
Acid Concentration ◽  
Sulfuric Acid Solution ◽  
Current Density ◽  
Electrochemical Impedance ◽  
Anodized Aluminum ◽  
The Common

Sulfuric acid anodization is one of the common methods used to improve corrosion resistance of aluminum alloys. Organic acids can be added to the sulfuric acid electrolyte in order to improve the properties of the anodized aluminum produced. In this study, the use of gallic acid as an additive to the sulfuric acid anodization of AA1100 was explored. The effect of varying anodization current density and gallic acid concentration on the properties of anodized aluminum samples was observed using electrochemical impedance spectroscopy, linear polarization, and scanning electron microscopy. It was observed that the corrosion resistance of samples anodized in gallic-sulfuric acid solution at 10 mA·cm−2 is lower than samples anodized in sulfuric acid. It was also observed that higher anodization current density can lead to lower corrosion resistances for aluminum samples anodized in gallic-sulfuric acid solution. However, samples anodized at 5 mA·cm−2 and at a gallic acid concentration of 5 g·L−1 showed better corrosion performance than the samples anodized in sulfuric acid only. This suggests that the use of low amounts of gallic acid as an additive for sulfuric acid anodization can lead to better corrosion resistances for anodized aluminum.

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