Wrought iron art products surface treatment method and choice
Wrought Iron arts products Surface treatment refers to the surface to prevent corrosion of iron products, eliminating and cover surface defects do not affect the strength of iron products appears and iron products for anti-surface coating (anti) rust and effects (appearance) of the decorative paint process the implementation process. To ensure the anti- (anti) rust and decorative effect to the purpose as long as possible, it is inevitable to take many of the corresponding surface pre-treatment process and post-plating method, and the selection of materials and application processes.
First, surface pretreatment Iron products
To ensure the decorated coated (plated) layer and the surface of iron products have a good combination of power, must be coated (plated) before the implementation of the oxide surface of the iron products, welding slag, rust marks, grease, dirt, moisture Exhaust Possible purge, otherwise easily lead coated (plated) layer blisters, cracking, peeling layer and so on. The so-called pre-treatment refers to mechanical or chemical, electrochemical process method to eliminate surface defects Iron products coated (plated) ago.
1, to rust, the main method of clearing oxide slag are manual processing, mechanical treatment, blast treatment, chemical treatment (pickling), electrochemical treatment and flame treatment or the like.
The main use of manual processing Shabu, scraper, chisel hammer, wire brush, scrap grinding wheels and other tools, by hand-polished knock shovel, sweep the brush to remove rust, scale and welding slag, dust and other surface dirt.
Mechanical treatment of the most common wind (Xinhua) dynamic brush, rust gun, polishing wheel and wind (electric) shovels and other tools, the role of mechanical force by means of high impact and friction rust and remove the old paint and dirt oxide .
Injection process is the use of mechanical centrifugation, compressed air, pressurized water as the driving force, the abrasive, sand, steel shot projectile into the surface of the iron products, impact and friction out of scale, rust marks, old paint, sand and the like.
Chemical treatment is the use of an acidic solution specially formulated to dip, dissolved iron products, through a chemical reaction to the ex-oxide, rust marks, oil, the so-called "acid."
2, degreasing for iron products is concerned, generally adopt organic solvents, lye, electrochemical method, current market sale of all kinds of metal cleaning agents are more applicable.
Second, surface protection and decorative wrought iron products (coating, plating) process Introduction
Wrought Iron products on the surface can be made to reduce and prevent corrosion of metal surfaces, but also play a decorative role in the process of implementation of the process is known as protection and decorative wrought iron products surface. For Iron products concerned, it is commonly used method surface protection and decoration integrated process. Specific treatment There are many ways, but in terms of iron products, commonly used coating and plating (hot dip), if both and use, in terms of durability is the best thing.
1, non-metallic protective layer: Iron products surface coating in one or several layers of organic and inorganic compounds, such as paints, plastics, rubber, asphalt, enamel, acid-resistant materials, anti-rust oil.
2, the metal protective layer: The Iron products coated with a layer of metal or alloy is not easy to rust, such as zinc, tin, nickel, chromium, copper, and titanium. Common methods: electroplating, sputtering, hot dip, etc., but for metal protective layer on iron products in general should be used in hot-dip galvanized as well. Because of the workpiece to be plated professional degreasing before plating rust and zinc at 440 degrees Celsius molten hot-dip, so the coating can hide a lot of flaws and gaps, to avoid future pan-rust (especially suitable for outdoor wrought iron products rust ), and has excellent adhesion properties.
3, chemical protective layer: chemical and electrochemical methods to make iron products surface to form a protective layer of non-metallic film, such as surface black, blue, phosphate treatment.
The protective layer obtained by several methods described above to protect itself played a role in both, has a certain decorative effect. But Iron products concerned, customers are increasingly demanding surface iron products not only to anti-corrosion, but also a variety of artistic effects textured, three-dimensional or vintage, antique, etc., or gorgeous appearance. Therefore, on the basis of the above, select the strongest affinity with the base surface, the paint of the most anti-aging brands and reasonable method of application, the more important the paint from the thousands of varieties currently on the market. Only targeted selection will achieve a predetermined decorative effect and reduce maintenance workload a few years later.