在栲胶生产中,凡是与单宁溶液接触的设备和管道,应尽量避免采用钢铁材料,因为单宁对钢铁有腐蚀作用,并且使产品质量变坏颜色加深。而另一方面,橡椀单宁已被作为水处理剂应用于中小型锅炉除垢与防垢。实践证明其是一种行之有效的方法,又普遍反映橡椀单宁对锅炉炉体起保护作用。为了探讨橡椀单宁对钢材的腐蚀问题,我们选用锅炉钢板在单宁水溶液中作了如下几种试验。(一)试验方法1.用锅炉钢板制成若干试片,除掉油污和铁锈,再用蒸馏水清洗干净,烘干恒 In tannin production, all equipment and pipelines that come into contact with the tannin solution should avoid the use of steel materials because tannin has a corrosive effect on the steel and deteriorates the quality of the product. On the other hand, the rubber tannin has been used as a water treatment agent in small and medium-sized boiler descaling and anti-scaling. Practice has proved that it is an effective method, but also generally reflect the rubber tannin play a protective role on the boiler body. In order to investigate the corrosion of rubber tannin on steel, we chose the boiler plate in tannin aqueous solution as the following several tests. (A) Test Method 1. Using a boiler plate made of a number of test strips, remove oil and rust, and then clean distilled water, drying constant