The soil structure, composition and content of trace elements affected the quality of the water in these areas.

土壤结构、成分、微量元素含量影响水的质量。

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To find the cause of perforation corrosion in a boiler tube, the chemical composition, mechanical properties, microstructure of tubes, the corrosion product and the water quality have been analyzed.

废热锅炉是合成氨装置的重要设备之一，其炉管与大管板焊缝受高温高压及介质腐蚀，运行一年后会产生裂纹，影响装置的正常运行。

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