The method of selection of aluminum windows and doors

About decorated owners, not only demand good quality decorative and also needs beautiful. Today, most of the windows are selected aluminum doors and windows, but after a long wind and sun, aluminum windows and doors is easy to rust, which needs careful selection of decorative owners aluminum doors and windows. If you want a good selection of quality aluminum windows and doors, we would have to know the aluminum doors and windows works and cause rust.

Door construction material not only ventilation, lighting and rain effects, and the most important thing is to build the facade, showing the construction of personality, publicity of the construction division of the personality. Since the Iron Door “laid off” in the future, aluminum doors and windows on its strength, light weight, easy to “rust”, was consumers.

But recently, aluminum doors and windows, “rusty” questions allows the architect and owners a big headache, blocks of magnificent buildings, and even no occupation aluminum doors and windows on the beginning “rusty” and even affect the construction of the appearance thereof. Aluminum doors and windows, “Rusty,” the reason is very complex, with a protective film of aluminum generally considered relevant. Currently about 80% of the market, aluminum is anodized to form a protective film – oxide film. Thickness and firmness of the oxide film is aluminum wear and corrosion resistance of the point.

Formal, promises good professional manufacturer of aluminum oxide film demand is very high, the thickness of the oxide film, hardness, firmness even tougher than the national standard over the years by consumers’ expectations and trust.

5052 aluminum properties and uses

5052 aluminum is a soft aluminum alloy material, the aluminum has a good thermal conductivity properties and deformation properties, corrosion resistance and weldability, has excellent anodized effect, widely used in the conductive material, the heat exchanger materials and other industrial equipment, hardware, and other materials.

5052 aluminum has good thermal processing and cold resistance, good corrosion resistance and weldability and conductive properties, has excellent anodized effect, widely used in household hardware, cooking equipment, jewelry and case materials and other industrial equipment . Can be a variety of aluminum extrusion products.

Surface Treatment Of Aluminum And Aluminum Alloys

Aluminum alloys are divided into two major categories: wrought and casting alloys. A further differentiation for each category is based primary on mechanism of property development. Many alloys respond to thermal treatment based on phase solubility. These treatments include solution heat treatment, quenching and precipitation, or age hardening.

In order to improve surface properties of final products, such as wear resistance, corrosion resistance, reflectivity etc., different types of surface treatment were designed. All of them are divided into several groups, such as electrochemical treatments, chemical treatments and coatings. In this article their terms and definitions will be explained.

Electrochemical treatment

Electrochemical brightening: Electrochemical treatment to improve the optical reflectivity of a surface.

Electropolishing: Polishing of a metal surface by making it anodic in an appropriate electrolyte.

Anodized metal Metal with an anodic coating, produced by an electrolytic oxidation process in which the metal is converted to a mainly oxide coating having protective, decorative or functional properties.

Clear anodized metal: Metal with a substantially colorless, translucent anodic oxidation coating.

Color anodized metal: Anodized metal colored either during anodizing or by subsequent coloring processes.

Integral color anodized metal: Metal that has been anodized using an appropriate (usually organic acid based) electrolyte which produces a colored coating during the anodizing process itself.

Electrolytically colored anodized metal: Metal with an anodic oxidation coating that has been colored by the electrolytic deposition of a metal or metal oxide into the pore structure.

Dyed anodized metal: Metal with an anodic oxidation coating colored by absorption of dye-stuff or pigments into the pore structure.

Combination color anodized metal: Metal with an anodic oxidation coating that is colored by electrolytic coloring or produced by integral color anodizing followed by absorption dyeing.

Interference color anodized metal: Metal with an anodic oxidation coating colored by means of optical interference effects.

Bright anodized metal: Anodized metal with a high specular reflectance as the primary characteristic.

Protective anodizing: Anodizing where protection against corrosion or wear is the primary characteristic and appearance is secondary or of no importance.

Decorative anodizing: Anodizing where a decorative finish with a uniform or a esthetically pleasing appearance is the primary characteristic.

Architectural anodizing: Anodizing to produce an architectural finish to be used in permanent, exterior and static situations where both appearance and long life are important.

Hard anodized metal: Anodized metal on which the anodic oxidation coating has been produced with wear and/or abrasion resistance as the primary characteristic.

Sealing: Treatment of anodic oxidation coatings on metal to reduce porosity and the absorption capacity of the coating by hydrothermal processes carried out after anodizing.

Cold impregnation: Treatment of anodic oxidation coatings on metal to plug the pores and reduce the absorption capacity of the coating by chemical processes carried out at low temperatures after anodizing.

Significant surface: The part of the product covered or to be covered by the coating and for which the coating is essential for serviceability and/or appearance.

Chemical treatment

Chemical brightening: Chemical treatment to improve the optical reflectivity of a surface.

Chemical polishing: Polishing of a metal surface by immersion in a solution of chemical reagents.

Degreasing: Removal of oil or grease, usually by a suitable organic solvent or an aqueous detergent.

Etching: Roughening of the surface of a metal by overall or selective dissolution in acid or caustic media.

Pickling: Removal of a thin surface layer of a metal by chemical action, mainly by treatment in a caustic solution.


Coating (organic): Method in which a coating material is applied on a metallic substrate. This process includes cleaning and chemical pre-treatment and either:

  • one-side or two-side, single or multiple application of liquid or powder coating materials which are subsequently cured or
  • laminating with plastic films.

Coil coating: Continuous coating of a metal strip.

Backing coat: Single coating of any type with no particular requirements for appearance, malleability, corrosion protection, etc. usually on the reverse side of the coated product.

Chemical conversion coating: Treatment of a metal with chemical solutions by dipping or spraying to build up an oxide film containing chromates or phosphates.

Priming: Application of a priming paint often pigmented with a corrosion inhibitor such as zinc chromate, after suitable pretreatment.

Pretreatment priming: Application of a solution containing a resin, a chromate and an acid, which is allowed to dry on and provide the key for subsequent painting.

Single coat system: Single coating either with requirements on appearance, malleability, corrosion protection, subsequent painting, etc., or as a primer with special properties regarding adhesion and corrosion protection for post-painting applications.

Multiple coat system: System comprising a primer or a base coat, possibly intermediate coat(s), and a top coat with particular requirements on appearance, malleability, corrosion protection, etc.

Organic coating: Dry paint film of the coated product or the organic film metal laminate.

Film coating: Organic film applied to a substrate to which an adhesive and, if appropriate, a primer has been applied beforehand.

Lacquering: Coating with a formulation based on a dissolved material which forms a transparent layer primarily after drying by evaporation of the solvent.

Painting: Coating with a non-transparent formulation containing pigments.

What is aluminum profile? aluminum profile description

Aluminum profile, it is different section shapes aluminum products through aluminum extrusion process. From raw material-aluminum ingot, after hot melting, get aluminum billets, and then finish aluminum extrusion process through porthole die or flat die, can get different shape aluminum products.  At this moment, the surface is mill finished and it is aluminum metal natural color.  The surface treatment can be done for aluminum profile in anodized(anodized silver, anodized bronze, anodized champagne, anodized black and anodized gold and some other special order), electrophoresis and powder coated color(RAL color) after different processes. Now with the development of aluminum metal surface treatment, fluorocarbon painting or wood grain (marble grain) heating transferring can be done on the aluminum profile surface.

Aluminum profile suppliers, manufacturers and exporters, the first choice is Foshan Shenghai Aluminum Co., Ltd.


Aluminium or aluminum (in North American English) is a chemical element in the boron group with symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic, ductile metal. Aluminium is the third most abundant element in the Earth’s crust (after oxygen and silicon) and its most abundant metal. Aluminium makes up about 8% of the crust by mass, though it is less common in the mantle below. Aluminium metal is so chemically reactive that native specimens are rare and limited to extreme reducing environments. Instead, it is found combined in over 270 different minerals. The chief ore of aluminium is bauxite.

Aluminium, Elements Table

Aluminium is remarkable for the metal’s low density and its ability to resist corrosion through the phenomenon of passivation. Aluminium and its alloys are vital to the aerospace industry and important in transportation and structures, such as building facades and window frames. The oxides and sulfates are the most useful compounds of aluminium.

Despite its prevalence in the environment, no known form of life uses aluminium salts metabolically, but aluminium is well tolerated by plants and animals. Because of their abundance, the potential for a biological role is of continuing interest and studies continue.


Extrusion is a process used to create objects of a fixed cross-sectional profile. A material is pushed through a die of the desired cross-section. The two main advantages of this process over other manufacturing processes are its ability to create very complex cross-sections, and to work materials that are brittle, because the material only encounters compressive and shear stresses. It also forms parts with an excellent surface finish.

Drawing is a similar process, which uses the tensile strength of the material to pull it through the die. This limits the amount of change which can be performed in one step, so it is limited to simpler shapes, and multiple stages are usually needed. Drawing is the main way to produce wire. Metal bar and tube are also often drawn.


Extrusion may be continuous (theoretically producing indefinitely long material) or semi-continuous (producing many pieces). The extrusion process can be done with the material hot or cold. Commonly extruded materials include metals, polymers, ceramics, concrete, play dough, and foodstuffs. The products of extrusion are generally called “extrudates”.

Hollow cavities within extruded material cannot be produced using a simple flat extrusion die, because there would be no way to support the centre barrier of the die. Instead, the die assumes the shape of a block with depth, beginning first with a shape profile that supports the center section. The die shape then internally changes along its length into the final shape, with the suspended center pieces supported from the back of the die. The material flows around the supports and fuses together to create the desired closed shape.


The extrusion process in metals may also increase the strength of the material.

Shenghai Aluminum Co., Ltd.


Foshan Shenghai Aluminum is a manufacturing enterprise that integrates with design, research and development and manufacturing of aluminum profiles. It is located in Nanhai District, Foshan in Guangdong Province, which is the “Town of Aluminum Profile” with advantageous geographic positions not far from Hong Kong and Macau. The products have been well sold in Southeast Asia, Middle East and South Africa.

Shenghai Aluminum specializes in manufacturing various extruding aluminum profiles and is equipped with oxidation, electrophoresis, spraying, sand blasting and wood-grain imitation production lines as well as deep processing equipment such as equipment for precision sawing, punching, drawing, polishing etc.

The products developed and manufactured by the company are aluminum profiles for doors, windows, furniture, decoration and industrial profiles, including aluminum profiles for guiding rails for curtains, light boxes, LED, advertising decoration, crystal steel doors, trimming blocks and aluminum profiles for doors and windows, square and round tubes for general purposes. The company can also manufacture according to the drawings of the customers.

“Profession, credibility and quality” is always the management principle of the company. The products, with professional development strength, excellent quality and reasonable pricing, have been appraised by all the new and old customers.

The company is sincerely expecting customers of all trades to come for co-development and cooperation for mutual benefits.