利用热解重量分析仪研究了铝镁合金在干湿环境中的热氧化，并用质谱仪分析了废气的成分。结果发现当水蒸气参与氧化的时候，有氢气产生。湿润环境（7%摩尔水）并不影响总氧化量，但似乎促进了在空气中和含5%二氧化碳的空气中的氧化。在含5%二氧化碳的空气中的氧化要比在纯空气中的氧化减少50-75%。有些试样在含5%二氧化碳的湿润空气中（7%摩尔水）没有显著氧化，这可能是由于在液态铝试样周围形成了强氧化层。碳粉涂层可以保护铝不被氧化，与没有碳粉涂层的试样相比，碳粉涂层延长了铝不发生氧化的时间，而且潮湿又加强了这种保护。这一研究在工业热脱涂层装置中有潜在的应用前景。
原文：
OXIDATION OF AlMg IN DRY AND HUMID ATMOSPHERES
Darcy Stevens1, Anne Kvithyld1, Thorvald Abel Engh2, Shawn Wilson1
1SINTEF Materials and Chemistry, Trondheim, N-7465, Norway
2Norwegian University of Science and Technology, Trondheim, NO-7491, Norway
Keywords: aluminum, oxidation, carbon residue, humid atmospheres
Abstract
Thermal oxidation of Al5%Mg was carried out in dry and humid atmospheres with a thermogravimetric analyzer (TGA), and the composition of off-gases was measured with a mass spectrometer. It was found that when water vapor participates in oxidation, hydrogen gas is produced. A humid atmosphere (7 mol% H2O) does not affect total oxidation mass, but seems to catalyze
oxidation in both air and air containing 5 mol% CO2. In an air atmosphere containing 5 mol% CO2, total oxidation is approximately 50-75 % less than in air alone. Some samples in humid air (7 mol% H2O) containing 5 % CO2 did not oxidize significantly, which may be due to a strong oxide layer which forms around the liquid aluminum sample. A carbon powder coating was shown to protect the aluminum from oxidation for an extended period of time compared to an unprotected sample and
humidity extended this protection. This work has potential applications in industrial thermal decoating units.
作者：Darcy Stevens 等，挪威
