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Topic: Anodising

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	Ase - Hard Anodising
		Hard anodising (Hard coat) is a term used to describe the production of anodic coatings with film thickness, corrosion and abrasion resistance as their primary characteristic.
		With the many new aluminium alloys now being produced and especially using the hard anodising process, the replacement of traditional metals are substituted for the lightness of aluminium and the superior properties of the hard anodic process, also the process is environmentally friendly both by the chemicals used and it's low cost for recycling.
		The number of applications for hard anodised aluminium continues to grow rapidly and any manufacturer or user of engineering equipment would be well advised to examine whether hard anodic coatings could not profitably and advantageously replace existing parts because of it's unique properties.
	www.ase4anodising.co.uk /Hard.htm (0 words)

	Anodising
		Anodisation is frequently used to protect aluminium and titanium from abrasion and corrosion and to allow it to be dyed in a wide range of colors.
		The color formed is dependent on the thickness of the oxide (which is determined by the anodising voltage); it is caused by the interference of light reflecting off the oxide surface with light traveling through it and reflecting off the underlying metal surface.
		Anodising may cause the screws to bind, thus the threaded holes may need to be chased with a tap to restore the original dimensions.
	www.dejavu.org /cgi-bin/get.cgi?ver=93&url=http%3A%2F%2Farticles.gourt.com%2F%3Farticle%3Danodising%26type%3Den (1176 words)

	Coatings and Fabrication
		Anodising is the process by which the natural film on aluminium is greatly increased in thickness.
		During anodising the part is made the anode (positive electrode) in an electrolytic cell.
		Anodised coatings should be washed down regularly (at least once each 6 months in less severe applications and more often in marine and industrial environments).
	www.coatfab.com /anodising.htm (1093 words)

	Anodising Summary
		Anodisation is frequently used to protect aluminium and titanium from abrasion and corrosion and to allow it to be dyed in a wide range of colors.
		The color formed is dependent on the thickness of the oxide (which is determined by the anodising voltage); it is caused by the interference of light reflecting off the oxide surface with light traveling through it and reflecting off the underlying metal surface.
		Anodising may cause the screws to bind, thus the threaded holes may need to be chased with a tap to restore the original dimensions.
	www.bookrags.com /Anodising (1992 words)

	Hard Anodising
		The anodising process provides a method of electrolytically increasing the thickness of the naturally occurring oxide film on aluminium and its alloys, to give a coating which may be considered in many ways analogous to the case hardening of steel.
		It is distinguished from 'decorative' or 'architectural' anodising in that the process is operated in a manner, which gives optimum technical properties without regard to aesthetic effect; thus, the coatings may be grey or tinged with yellow or brown, according to the alloy and coating thickness.
		Anodising lowers the fatigue strength of alloys but this reduction is said to be restored to some extent by hot sealing.
	www.hard-anodising.co.uk /hard-anodising.asp (0 words)

	ESTAL - Anodising of Aluminium (Site not responding. Last check: )
		Anodising is an oxidation process based on electrolyse and acting on the aluminium material.
		Hard anodising is a specific electrolytic process designed to produce hard and thick films on aluminium and its alloys.
		Anodised aluminium is easy to clean and requires little maintenance.
	www.estal.org /anodising.htm (209 words)

	What is Anodising?
		While the chemical anodising process remains the same for all applications, the mechanical methods vary according to the two physical types and shapes of metals used.
		Hard Anodising is a term used to describe the production of anodic coatings with film hardness or abrasion as their primary characteristic.
		They are usually thick by normal anodising standards (greater than 25 microns) and they are produced using special anodising conditions (very low temperature, high current density, special electrolytes).
	www.anodising.org /whatis.htm (0 words)

	Macro Developments specialises in all areas of anodising.
		Anodising produces an insulated surface, however this can be masked to limit the areas treated.
		Hard anodising is not usually sealed after processing as this can cause the film to become brittle.
		Anodising dissolves some of the surface aluminium and the resulting growth is about half the film thickness produced.
	www.macrodevelopments.co.uk /anodising.htm (313 words)

	Anodising - Anodising Aluminium - Anodizing - Anodize - Anodizing Aluminium (Site not responding. Last check: )
		The beauty of anodising is the ability to enhance the natural metallic lustre of aluminium with a process that creates an extremely durable surface, which has withstood the test of time.
		Anodising has also long been the preferred finish for aluminium boating applications.
		As anodising is a natural process, colour variations may occur.
	www.alufinish.com.au /anodising.php (862 words)

	Brazing and electroless nickel plating from TTI Group ---
		Anodising is the controlled formation of aluminium oxide at the surface of items made from aluminium and its alloys.
		Hard anodised films are usually supplied unsealed for maximum abrasion resistance, but can be further treated with dyes, solid phase lubricants or chemically sealed for high levels of corrosion protection.
		Chromic anodising is normally used for the corrosion protection of critical engineering components that require only a thin film with minimum dimensional effect or to ensure maximum fatigue integrity.
	www.ttigroup.org.uk /portal.aspx?mlmenuid=2070&TargetPortal=31&ApplicationID=33 (402 words)

	BeoWorld.co.uk... a World of Bang & Olufsen online (Site not responding. Last check: )
		Anodised aluminium has been a Bang and Olufsen hallmark for many years, but as the mirror-finished anodisation process is one of the most demanding metallurgic surface processes, Bang and Olufsen is the only manufacturer of audio and video equipment to use it.
		The unique anodised finish is the only one in the metals' industry that satisfies each of the factors that must be considered when selecting a high performance aluminium finish.
		Anodising is a reacted finish that is integrated with the underlying aluminium for total bonding and unmatched adhesion.
	www.beoworld.co.uk /anodising.htm (1254 words)

	[No title]
		Anodising is a process whereby a coating of porous aluminium oxide is formed on the surface of aluminium.
		Anodising does NOT hide blemishes; the final result can be no better then the finish on the metal.
		Anodising bath - The only metals that should be used for the bath are lead and aluminium.
	members.lycos.co.uk /ora8i/Anod.htm (1750 words)

	Colour Anodising Ltd
		Colour Anodising is able to offer a wide range of finishes and has a substantial range of jigs suitable for anodising a huge range of components.
		Colour Anodising Despatch Department operates a collection and delivery service within the Northwest and West Yorkshire areas.A daily carrier service is available for next day deliveries across the UK and transport can be arranged to mainland Europe or further afield.
		Checks for consistency of finish and purity of colour are undertaken during each phase of the anodising process.
	www.anodising.com /html/services.htm (0 words)

	Anodising - Definition, explanation
		Anodizing or Anodising is a process used to protect aluminium from abrasion and corrosion and to allow it to be dyed in a wide range of colors.
		The process derives its name from the fact that the part to be treated forms the anode portion of a electrical circuit in this electrolytic process.
		Anodisers of aluminium (alumina), Honeyglen Anodising offer an unrivalled service to the UK anodising (anodizing) market and to the rest of Europe...
	www.calsky.com /lexikon/en/txt/a/an/anodising.php (606 words)

	Aluminium anodising, aluminium extrusions, fabricators, powder coating and anodising, uk
		Anodising is a conversion of the metal,which creates a protective inert film of Aluminium oxide.
		The Anodising process is Electro-chemical in which the natural oxide film is created by passing an electric current through dilute Sulphuric Acid with the Aluminium part as the anode.
		The anodised film created is microscopically porous, which needs "sealing" in either boiling water with a simple soap addition or some of the newer seal additives.
	www.snelsons.co.uk /aluminium_anodising.html (378 words)

	Titanium and Titanium Alloys - The Anodising Process and Its Effects
		Where components are not subjected to continual wear, which will cause the layer to be removed, anodising provides a simple cost-effective solution.
		Progressive thickening of the oxide film by anodising results in a surface colour change due to the refraction of light.
		Anodising has also been used as a means of removing surface iron contamination — for example as a final clean up operation on titanium fabrications.
	www.azom.com /details.asp?ArticleID=2694 (376 words)

	Anodising
		Anodising is a process in which the aluminium surface is "passivated": the chemistry is sealed and prohibited from bonding with any organic coating, including powder coat.
		Anodising is not designed as a "coatable" surface, which explains the reasons why there have been dramatic failures.
		Whilst there have been local claims of success with anodising surfaces for powder coating, they are principally due to inadequate sealing of the anodising product to start with.
	www.olympicaluminium.com /anodising.htm (254 words)

	Anodising process parameters (Site not responding. Last check: )
		If the current density is too low, long anodising time will be necessary leading to excessive electrolyte attack on the oxide layer which in turn gives poor quality of the anodic oxide.
		In normal sulphuric acid anodising the voltage is between 14 to 18 Volt.
		To avoid this problem, profiles of different alloys should never be anodised at the same jig or in the same tank at the same time.
	www.alu-info.dk /Html/alulib/modul/A00302.htm (438 words)

	Anodising Engineering Consultants SEC
		SEC has registered anodising consultants with many years of practical industrial experience in anodising.
		Largely this relates to anodising aluminium and its alloys.
		It is important to know the alloy being anodised, since for optimum finishing the solutions could vary both in the pre-treatment and the anodising.
	www.secfinishes.co.uk /anodising.htm (252 words)

	Hydro - Anodising
		We are able to give the aluminium profiles some at the same time both protective and ornamental features.
		Anodising is an electrochemical process which artificially increases the thickness of the natural, transparent oxide layer, which is an integrated part of the aluminium surface.
		Whereas the natural oxide layer is only 0.2 micron thick, the thickness of the layer after anodising is usually from 5 till 25 micron depending on the usage.
	www.hydro.com /extrusion/tonder/en/products_services/anodising/index.html (120 words)

	Tecan - Anodising
		Type III hard anodising of aluminium uses a specialist solution to provide a very durable finish that is typically used for bearing applications or cylinder housings requiring protection of the substrate from friction.
		Titanium anodising is used primarily as a protective layer of the substrate prior to painting.
		Contact us now to discuss your anodising requirements or talk to one of our technical advisers who are online now to answer any questions you may have - simply click on the live help icon.
	www.tecan.co.uk /finishing/pmf/anodising.php (171 words)

	Kurion UK - Chromic Acid Recycling for Chromic Acid Anodising
		Anodising is an anodic oxidation process used to increase the naturally occurring aluminium oxide layer on aluminium surfaces, the process is carried out in a dilute acid solution with the work piece being made the anode.
		The “free” chromic acid refers to the chrome in its hexavalent or oxidised state whilst the total figure refers to the presence of the free or hexavalent chrome and trivalent or reduced chrome.
		The free chrome is the component that allows anodising to proceed, the reduced chrome carries out no useful function in the process.
	www.kurion.co.uk /Chromic_Acid_Recycling.html (453 words)

	Creative Chemistry - Anodising Aluminium
		There are four stages, preparing the aluminium, preparing the anodising cell, anodising, and dyeing.
		During anodising, a light spray of acid is produced because of gas bubbles formed at the metal electrodes.
		During anodising, a fine spray of acid may be produced, so it is important to keep the beaker lightly covered by a paper towel.
	www.creative-chemistry.org.uk /activities/anodising.htm (1066 words)

	Anodising and Corrosion Resistance
		The hard anodising process coats the metal with a layer of aluminium oxide, which is chemically inert under neutral, or mild acidic conditions of exposure.
		Because the oxide coating is derived in part from the metal itself, the constituents of the particular alloy have an effect upon the nature of the coating and upon its corrosion resistance.
		It should be particularly noted that anodising of alloys of poor inherent corrosion resistance (eg Al-Cu alloys) will give a useful measure of protection, but the performance of the system will not compare with that of one in which the alloy itself has good resistance to the corrosive medium.
	www.hard-anodising.co.uk /corrosion-resistance-anodising.asp (0 words)

	Hot AC anodising - SINTEF
		The aim of this long term ongoing activity has been to promote the use of anodising as an environmental friendly alternative to hexavalent chromium for the pre-treatment for aluminium before coating.
		Objectives of the work has been to optimise the anodising pre-treatment process in terms of corrosion resistance and adhesion, to document the quality of the process and to replace chromium in industry
		Hot AC anodising techniques are found to be the only Cr-free pre-treatments that can compete with chromating on corrosion protection
	www.sintef.no /content/page1____3701.aspx (126 words)

	Metro Plating - Chromic Acid Anodising - To DEF STAN 03-24 - Aluminium Casting Finishing
		Chromic acid anodising is a specialist surface finish used primarily within the defence and aerospace sectors and industries where subsequent painting/adhesive bonding is required or in applications where crack detection is sought.
		Chromic acid anodising is the preferred process for the treatment of castings and other components where the minimisation of the loss of fatigue strength resulting from the anodising process is desirable.
		Chromic acid anodising is not suitable for colour dyeing due to the thin (2-3µm) coating layer as most colours will appear blotchy, however fl dyeing is usually quite reliable and effective.
	www.metroplating.co.uk /chromic-acid-anodising.php (323 words)

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