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1 前言 氢氧化钠对金属设备的腐蚀是制约烧碱工业发展的重要因素之一。目前,烧碱产品主要有两种规格:32～50％的液碱与96％以上的固碱。而近年来的研究与经济分析表明:生产氢氧化钠浓度为73～74％的低浓度的固碱具有明显的优点—生产简单,能耗低,产品易于贮存与运输等,特别是将国内产量很大的隔膜液碱加工成低浓度的固碱更有实际意义。该产品开发的关键之一乃是解决碱液(特别是隔膜碱)对设备的腐蚀问题。
1 Introduction Sodium hydroxide on the corrosion of metal equipment is an important factor restricting the development of caustic soda industry. At present, there are two main specifications of caustic soda products: 32 ~ 50% caustic soda and 96% solid caustic soda. In recent years, research and economic analysis have shown that: the production of sodium hydroxide concentration of 73 to 74% of the low concentration of solid base has obvious advantages - simple production, low energy consumption, easy storage and transportation of products, especially the domestic output Large diaphragm caustic soda into a low concentration of caustic soda more practical significance. One of the keys to the product development is to solve the problem of corrosion of equipment by lye (especially diaphragm base).