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大力开发地下水已成为发展工农业生产、城市供水以及支援第三世界革命和建设的迫切任务。我国打深井所需滤水管材一向采用铸铁管和钢管，每年要耗用大量的钢材、铜材和铅丝，用以制造深井滤水管。由于滤水管受地下水的化学、电化学、杂散电流和铁细菌的腐蚀，寿命很短，象天津、新乡、武汉和杭州等地地下水腐蚀严重的地区，滤水管使用寿命很短，多则五至七年少的二、三年，就腐蚀坏了，井的寿命受到严重威胁，直接影响到工农业生产和城市供水。在援外方面，特别是援助西非国家，这些国家水质条件较恶劣，腐蚀严重，铁管一般用一、二年就报废了。
The vigorous development of groundwater has become an urgent task for the development of industrial and agricultural production, urban water supply and support for the third world revolution and construction. China’s deepwater wells need to use cast iron pipes and steel pipes, which consumes a large amount of steel, copper and lead wire every year to produce deep well water filtration pipes. Due to the chemical, electrochemical, stray currents of groundwater and the corrosion of iron bacteria, the filter pipes have a short life span. In areas with severe groundwater corrosion in places like Tianjin, Xinxiang, Wuhan and Hangzhou, the service life of the water filter pipes is very short. In the two or three years to seven years, the corrosion has deteriorated and the longevity of the well has been seriously threatened, directly affecting industrial and agricultural production and urban water supply. In foreign aid, especially in aiding West African countries, these countries have relatively poor water quality and serious corrosion. Iron pipes are generally scrapped in one or two years.