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一、前言喷铝,已较广泛地用于抗海洋性大气或工业性气氛的腐蚀,其优点在于基本上不受工件尺寸的限制,设备和技术都较简便。在工业大气环境下,喷铝0.15～0.20毫米,可耐用10～20年,0.25～0.30毫米,可耐用20～40年,0.30～0.37毫米,可耐用40年以上;在含盐份的大气环境下,喷铝0.15～0.20毫米,可耐用5～10年,0.20～0.25毫米,可耐用10～20年,0.25～0.28毫米,可耐用20～40年,0.30～0.37毫米可耐用40年以上。在作为油漆底层时,喷铝层最小厚度,实际上是0.10毫米;作为抗高温涂层时,是0.15～0.20毫米。喷铝层是大量的铝的小颗粒堆积在基体金属的表面上,形成片状的堆积组织,一般与底金属没有熔合现象,主要是机械的结合;这样基体金属表面状况就直接地影响着结合强度的好坏。金属表面的预处理方法很
First, the preamble Spraying aluminum, has been more widely used for anti-marine atmosphere or industrial atmosphere corrosion, the advantage is basically not subject to the size of the workpiece, the equipment and technology are more simple. In the industrial atmosphere, spray aluminum 0.15 ~ 0.20 mm, durable 10 to 20 years, 0.25 to 0.30 mm, durable 20 to 40 years, 0.30 to 0.37 mm, durable 40 years or more; in salty atmosphere Under the spray aluminum 0.15 ~ 0.20 mm, durable 5 to 10 years, 0.20 to 0.25 mm, durable 10 to 20 years, 0.25 to 0.28 mm, durable 20 to 40 years, 0.30 to 0.37 mm can be durable more than 40 years. When used as the bottom layer of paint, the minimum thickness of the sprayed aluminum layer is actually 0.10 mm; as a high temperature resistant coating it is 0.15-0.20 mm. Sprayed aluminum layer is a large number of small particles of aluminum deposited on the surface of the base metal to form a sheet of the accumulation of tissue, usually no fusion with the end of the metal, the main mechanical combination; so the matrix metal surface conditions directly affect the combination Strength is good or bad. Metal surface pretreatment method is very