热喷涂铝覆盖层在防腐中的应用

目前我国钢结构件的防腐大多沿用传统的涂刷油漆方法，其防护周期较短，维修频繁，不仅消耗大量的人力物力，而且对连续运作的钢铁构件正常运行造成很大困难。热喷涂主其复合覆盖层用于钢结构件的长效防腐有其特有的优越性。这种覆盖层是利用热源将铝比溶化再经高压空气雾化成细小颗粒，高速撞击到经过预处理的钢基体表面上，堆积而成的覆盖层。热喷涂的喷涂工艺常采用火焰喷涂和电弧喷涂。通过各项数据比较，认为电弧喷涂的质量优于

Application of Aluminum Hot Spray Coating for Corrosion Con-trol.

Corrosion control of steel structures has been achieved in China by traditional paint application, which has such disadvantages of short protective life and low economic effectiveness, hence preventing the steel structure from long term service. Composite coating of hot sprayied aluminum enjoys unique advantages such as long term anticorrosion performance. This kind of coating is applied by melting aluminum wire and atomizing it with high pressure air into fine articles which then are forced onto the prepaired steel surface at high speed and finally accumalating into coating. Two hot spray technologies are available;flame spraying and arc spraying. In terms of different specifications, arc spraying is considered superior over flame spraying. Many applications of hot spraying for the protection of equipment in petroleum storage and transportation industry can be found both in China and abroad,and considerable economical and social benifits are achieved.