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Reduce process time while reducing your chemical costs!
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Chromate Conversion on Houston like Alodine or Iridite is a chemical treatment for aluminum used to present corrosion protection and also surface preparation for paint and other adhesives. Chromate is a superb treatment for paint or adhesives as it greatly enhances the product's ability inorder to form a bond with the aluminum. It is often used on electrical and electronic equipment as it provides increased corrosion resistance even as remaining electrically conductive. The oxide film formed by this process varies in color, depending on the aluminum alloy that is being treated, surface conditions, and type of chromate. The key benefits of alodine are. 1. It resists corrosion. It is indicated that the alodine treated surface withstands corrosion in a five percent of salt spray test for 168 hours. Results vary depending on the alloy of the material and surface finish. 2. Alodine is an outstanding paint base. As the coating is not applied electrically and could be applied quickly, alodine is one of the most cost effective methods to provide a appropriate primer base prior to applying a paint. 3. It is decorative. Alodine have a light gold to dark gold appearance depending on your personal preferences.
The extensive use of zinc, both as a sacrificial coating on steel and also as a stand-alone material, require a high level of corrosion resistance in order to increase the product life cycle and to avoid ecological pollution by metal ions. Zinc coatings and castings on steel can be anodized so as to produce a tough and stable coating. The corrosion resistance is said to be superb. Being used by the military immersed on the subs for high corrosion problem areas such as mooring cleats with good results. A special zinc anodizing handling is available for zinc castings. This coating is entirely different than that for aluminum alloys. Anodizing zinc is a practical coating providing maximum corrosion resistance in both atmospheric and marine environments. As the process uniformly coats deep recess and threaded areas, anodized zinc alloy castings could serve as an economical alternative when replacing traditional bronze, brass and stainless steel components. Steel items could be fabricated, hot zinc dipped then anodized. The sturdiness of such fittings are said to rival that of stainless steels. Deep scratching does not seem that compromise the durability.
Anodising is the procedure by which the natural film on aluminium is very much increased in thickness. The metal is on the anodic side of the galvanic series. Its position is alike to zinc and magnesium, i.e. it is readily oxidised. This oxide on aluminium is physically corrosion resistant, abrasion resistant, very hard, an insulator and very tenacious. In its natural form the oxide film is less than 0.50 microns thick. Since the naturally occurring film is so thin and attached to a soft supple metal, it is easily damaged. So building up this coating will provide very useful properties for the aluminium anodising on Dallas. PreparationThe very basis of every excellent coating is preparation. In anodising, good preparation is necessary. Oils and greases are removed in weak alkali solutions and the exterior is etched to remove heavy oxides. After rinsing, the aluminium metal is dipped into a desmut solution so as to remove the insoluble components of the aluminium which remains on the outer surface after etching, rinsed and presented for anodising.
In the process of chromate conversion on Houston, the metal surface of a piece is converted to a superficial layer that contains a complex mix of chromium compounds. The chromate film will be soft when freshly formed, but when gets dried and aged, the film becomes more rough resistant. These coatings provide an excellent corrosion resistance. Paint, organic finishes and lacquer bond very well into chromate conversion coatings. In addition, the coatings prevent loss of plain adhesion owing to underfilm corrosion. Conversion films might vary in color depending upon the chemicals that are being used and the foundation metal being coated. Colors often range from clear, to light iridescent, to gold. Better corrosion protection is provided with formulations that give golden color, as these films tend to be thicker. A multicolored appearance may be attained when the base metal is non-uniform (i.e., welds in shaped materials and castings). Benefits of Chromate Conversion- enhanced corrosion resistance
- Good bonding surface for paint & its adhesives
- It is highly electrically conductive
- Relatively inexpensive
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Previous
Posts
Brass plating chemicals
Nickel plating chemicals
Gold plated chemicals
Copper plating chemicals
Importance of Electroplating
Different types of metal finishing chemicals
Different types of metal plating chemicals
Use of hard anodized aluminum
Overview on Decorative chrome plating
Benefits of Metal Plating
April 2008
May 2008
June 2008
July 2008
August 2008
September 2008
October 2008
November 2008
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