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The best method of surface treatment technology for wrought iron products

Number of visits: Date:2017-04-24

Iron products surface treatment in order to prevent the corrosion of iron products surface, eliminate and cover the surface defects of iron products, and the iron products surface coating, brush. The process of spraying antirust and artistic decorative effect.

In order to ensure the corrosion resistance and decorative effect to achieve as long as possible, it is inevitable to take a lot of corresponding surface treatment process and the later stage of the construction process and material selection.

Iron products surface treatment

In order to ensure the decoration spraying layer and iron products surface has good adhesion, must be sprayed before implementation of iron oxide on the surface of the skin, welding slag, traces of rust, grease, dirt, water for free as possible, otherwise easily lead to blistering, cracking, coating layer and peeling phenomenon. The so-called processing refers to the use of mechanical or chemical, electrochemical and other methods to eliminate iron products before spraying the surface defects.

1. The main methods of removing rust and removing the slag from the surface of the oxide are manual processing, mechanical treatment, spray treatment, chemical treatment (pickling), electrochemical treatment and flame treatment.

Manual processing mainly use emery cloth, scraper, chisel, wire brush, waste grinding wheel tool, polished by hand knock shovel, brush to remove rust, scale and welding slag, dust and other dirt on the surface.

Mechanical processing of the most commonly used wind (electric) brush, rust gun, polishing wheel and wind (electric) shovel and other tools, with the help of high-frequency mechanical impact and the role of friction and rust removal of old paint and other dirt.

Injection processing is the use of mechanical centrifugal, compressed air, high pressure water as power, the surface of abrasive, sand, steel projectile iron products, impact and friction off scale, rust, paint, sand and other old scars.

Chemical treatment is the use of special formulations of acidic solution to soak, dissolve iron products, through chemical reactions to remove the net oxidation, rust marks, oil, which is called "pickling".

2, in addition to oil for iron products, generally can use organic solution, alkaline solution, electrochemistry and other methods, the current market for the sale of a variety of metal cleaning agent is also more applicable.

Two, iron products surface protection and decoration (coating, plating)

On the surface of iron products can be protected to reduce and avoid metal surface rust, but also play a decorative role in the process of the implementation of the process known as iron products surface protection and decoration. For iron products, the general use of surface protection and decoration integrated treatment methods. There are many ways to deal with specific, but in terms of iron products, is commonly used in painting and electroplating (hot plating), if the two are used in terms of durability is the best.

1, non-metallic protective layer: in the iron products surface coating layer or layer of organic and inorganic compounds, such as paint, plastic, rubber, asphalt, acid resistant materials, rust proof oil.

2, metal protective layer: iron products on the surface of a layer of metal or alloy is not easy to rust, such as zinc, tin, nickel, chromium, copper, titanium, etc.. Commonly used methods are: electroplating, spray, hot dip plating, etc., but for the iron products on the metal protective layer should generally choose hot dip galvanized as good. The workpieces before plating professional oil to rust and high-temperature dipping in zinc melt is 440 degrees Celsius, so the coating covers many defects and cracks, avoid rust after the pan (especially suitable for outdoor antirust iron products) and have excellent adhesion.

3, chemical protective layer: protective layer by chemical and electrochemical methods to make products surface to form a layer of metal film, such as surface blackening, bluing and phosphate treatment etc..

The protective layer obtained by the above methods can play a protective role and has a certain decorative effect. But for iron products, the majority of users demand more and more iron products surface not only to rust, but also have different texture, stereo or imitation of old, antique and other artistic effect, or gorgeous appearance. Therefore, on the basis of the above, the current market in the sale of thousands of varieties of paint in the selection of the strongest affinity with the base surface, the most resistant to the aging of the paint brand and a reasonable method of application, the more important. Only targeted selection will achieve a predetermined decoration effect and reduce the number of years after the maintenance workload.

TypeInfo: Industry Dynamics

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