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Anodizing Finishing Options Keili Metals offers several coating and finishing options, all in-house, to provide a complete service for your metal sourcing and finishing requirements. Capacity = 6000 MT/annumType: Horizontal with automated material transfer facility. Anodizing increases corrosion and wear resistance, and provides better adhesion for paint primers and glues than bare metal. This film will not crack, peel, or chip unless subject to severe stress or extreme thermal changes.
A chemical pre-clean, followed by immersing the aluminum in a chemical to give the required finish: Phosphoric-acid solutions giving a bright finish and a caustic soda based solution, giving a matt appearance. Anodization changes the microscopic texture of the surface and can change the crystal structure of the metal near the surface. Coatings are often porous, even when thick, so a sealing process is often needed to achieve corrosion resistance. Anodizing also provides a means of coloring the oxidized metal. Anodic films are colored by a variety of methods. Pigments and organic or inorganic dyes are dissolved in heated water and the products immersed prior to sealing while they are still porous. The thickness of the aluminum-oxide coating can be varied by processing time. The following figures are industry standards:
ISO9001 and ISO14001 The coating is typically applied and then heated to allow it to flow and form an exterior layer tougher than conventional paint. Powdered resins along with colored pigments are applied to metal products using an Electro-static charge. The product is then "baked" in a high temperature oven causing the powder to melt, flow, and then cure, forming a molecular fusion bond. As with solvent based paints, thermosetting powders can be formulated to produce high and low gloss decorative coatings, metallic, as well as textured & hammered finishes. Certfications include: BS 6496, AAMA2603, AAMA2604 and GB
Before painting, all profiles must be pre-treated(Chromate). During painting, we test coating thickness and color difference. It is very important that during the priming stage the component is kept clean, for this reason anodizing is an ideal pre-treatment for painting. The components are then suspended and passed through the spray booth where the powder is applied by spray guns. Powder spray guns can be adjusted for powder and air volume, after spraying the paint is cured in an oven. Polyvinylidene Fluoride or PVDF is a highly non-reactive and pure thermoplastic fluoropolymer. It is also referred to by the specific names of common products such as KYNAR, HYLAR, or SYGEF. PVDF is a specialty plastic material used generally in applications requiring the high purity, strength, and resistance to solvents, acids, bases and heat and low smoke generation during a fire event. This coating is normally used to provide outstanding aesthetics and durability in a wide range of architectural uses. The process of manufacturing is not very different with normal liquid coatings PVDF coatings are made of PVDF fluoropolymer resin and inorganic ceramic pigments. Coated onto aluminum, it can last decades without coating chalk or obvious color change. PVDF coatings are considered as most durable coatings by far. There are several types of PVDF coatings: coil PVDF coatings, liquid PVDF spray coatings and powder PVDF coatings. Although aluminum window, wall, and entry systems are light, strong, durable, and easily extruded into the complex shapes, one concern is aluminum's high thermal conductivity. In cold climates, a simple aluminum frame can easily become cold enough to condense moisture or frost on the inside surfaces of window frames. Even more than the problem of heat loss, the condensation problem has spurred development of better insulating aluminum frames. The most common solution to the heat conduction problem of aluminum frames is to provide a "thermal break" by splitting the frame components into interior and exterior pieces and use a less conductive material to join them. Insulation around a ‘thermal bridge' is of little help in preventing heat loss; the bridging has to be eliminated with a thermal break. A thermal break is poured or placed in the system assembly/ profile system to reduce or prevent the loss of heat. This technology involves the joining of two parent aluminium extrusions by the mechanical insertion of extruded polyamide strips in order to form a single complete thermally broken assembly. A continuous thermal break prevents heat loss from metal-to-metal contact between inside and outside surfaces, and an airseal blocks airflow between sections.
Whether supplying FOB, CIF, DDU, DDP, etc...We are flexible with packaging according to our client needs. All delivery containers are front loading, no crane or special equipment is required to unload. The packaged bundles sit on a steel dolley inside the container, you only need to open the door and roll them out with your forklift. Keili Metals will accomodate your packaging, transportation, and delivery specs, tomake material handling as convenient as possible. |
In the Earth's crust, Aluminum is the most abundant metallic element, second most abundant material after silicon), and the third most abundant of all elements (after oxygen and silicon). » More Info…
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Anodizing
The Process
Powder Coating
The Process
Thermal Break 
Keili Metals delivers ‘container direct' from our mill facilities. A container holds between 38,000-44,000 lbs (17-20 tons), depending on the profiles being packed and accounting for airspace inside the container.
We also offer the service of trans-loading your aluminum onto flatbed truck for delivery. We will trans-load from container to flatbed at the port and deliver to your door as specified.
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