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前言钢铁表面的发黑是一种应用广泛的保护性涂饰。通常采用的传统工艺是在高温下,进行碱性氧化发黑。近年来我校研制的常温发黑剂是在常温下,利用化学转化原理进行发黑,其工艺较之于传统碱性发黑具有省时、省电、简便及改善生产条件等许多独特优点,因而在现代的表面处理工业中得到越来越广泛的重视。常温发黑是通过发黑剂中某些离子在钢铁表面进行氧化还原反应,置换沉积出一保护性的黑色膜层,其主要反应如下: 2/3Fe+Cu~(2+)→Cu+2/3Fe~(3+) 4H~++Cu+H_2SeO_3→CuSe↓(黑) +3H_2O 发黑剂其主要成份cu~(2+)及SeO_(3)~(2-),在发黑过程中随着氧化还原反应的不断进行,槽
Foreword Blackening of the steel surface is a widely used protective coating. The traditional process is usually used at high temperatures, alkaline oxidation of black. In recent years, our school developed at room temperature blackening agents at room temperature, the principle of chemical conversion of black, the process compared with the traditional alkaline black with time saving, power saving, simple and improve the production conditions and many other unique advantages, Thus in the modern surface treatment industry has been more and more attention. Blackening at room temperature through the redox agent in the iron surface of some ions in the redox reaction, the replacement of deposition of a protective black film, the main reaction is as follows: 2 / 3Fe + Cu ~ (2+) → Cu +2 / 3Fe ~ (3 +) 4H ~ + + Cu + H_2SeO_3 → CuSe ↓ (black) + 3H_2O blackening agent its main components cu ~ (2+) and SeO_ (3) ~ As the redox reaction continues, troughs