本文对低合金钢腐蚀产物离海后的稳定性进行了研究。海港挂片试样离海后采用酒精浸泡去水,冷风吹干去酒精,然后用环氧树脂涂封锈层,外面用气相防锈纸包扎并放入干燥器中。取样时,在氩气柜中取下锈层后立即放入充氩的试管中,再从试管中取出部分锈样放入有机玻璃制的穆斯堡尔谱样品盒,并将缝隙密封。这样能保留极不稳定的Fe(OH)_2。如果让锈层与空气接触,则Fe(OH)_2很快分解消失,而其它物相可经历相当长的时间而不变化。物相是否发生了变化是根据穆斯堡尔谱判断的。
This paper covers a study of the stability of corrosion products on low alloy steels after leaving sea water. When taken from the sea, the samples are de-watered in alcohol, dried in cold air and coated for sealing with epoxy resin.Then the samples are packed with antirust paper and kept in a desiccator. Then the scales are taken off the steel samples in an argon cabinet and are immediately put into a test tube filled with argon. Part of the rust scale is then transferred into a sample box made of organic glass sealed leakproof and is ready for Mossbauer spectrum analysis. In this way the decomposition of extremely unstable Fe(OH)_2 can be avoided. Once the scale is exposed to the air, Fe(OH)_2 will decompose, while other physical phases will remain unchanged for a relatively long time. Any changes in physical phases will be shown from the results of Mossbauer spectrum analysis.
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