What is Aluminium Anodizing and How Does It Work | Anodizing Process Overview
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- Опубліковано 30 вер 2024
- Anodizing is an electrochemical process which converts the surface of the metal into a long-lasting, high performance aluminum oxide finish.
This protective finish makes it very hard and durable, and enhances its resistance to corrosion.
The anodizing process is, in simplified terms, the highly controlled enhancement of a phenomenon that already occurs naturally - oxidation.
Aluminium is well-suited to anodizing, making it one of the most respected and commonly used materials for consumer, commercial and industrial products in comparison to other metals.
Other nonferrous metals, such as magnesium and titanium, can be anodized, but the composition of aluminium makes it ideally suited to the process.
The unique anodized finish is the only one in the metals industry that satisfies each of the factors that must be considered when selecting a high-performance aluminum finish that is required for luxury items and interior design such as loud speakers, lighting, electronics, watches and trays.
ALUMINIUM ANODIZING
Anodizing is an electrochemical process which converts the surface of the metal into a long-lasting, high performance aluminum oxide finish. Because it is integrated into the metal rather than just applied to the surface, it cannot peel or chip. This protective finish makes it very hard and durable, and enhances its resistance to corrosion. Depending on the process, the anodized finish is the second-hardest substance known to man, exceeded only by the diamond.
The anodizing process is, in simplified terms, the highly controlled enhancement of a phenomenon that already occurs naturally: oxidation. The aluminium is immersed in an acid electrolyte solution through which attached electrodes pass an electric current at very low temperatures. The result is a high-performance, hardcoat surface. However, the metal remains porous so it can be colored and sealed, or undergo additional processing, if desired.
BENEFITS OF ANODIZING ALUMINIUM
Aluminium anodizing creates an extremely hard surface that can withstand extreme wear and tear. This includes industries such as military and defense, construction, applications such as elevator doors and escalators, and even home cookware. The primary benefits of anodizing aluminium include:
DURABILITY
- The finished product will enjoy a long lifespan and require little maintenance
- Stable color
- Anodizing dyes seep into the metal, making them very stable. Anodized aluminium maintains its color in spite of exposure to UV rays. It will not flake, peel or chip, and extrusions will look factory new for years.
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Hydro's Extrusion plant in Portland, Oregon, USA provides extrusion, machining, fabrication, and finishing services. Hydro Portland also provides in-house painting and anodizing services: www.hydro.com/...
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![How to Anodise Aluminium at home [how i anodised at home]](http://i.ytimg.com/vi/toGB1Mra2mU/mqdefault.jpg)
Thank you so much for explaining this so clearly with real visuals
Anodising is an electro chemical process
It will not chip or peel (but doesn't last forever does it! Anodising does not resist salty water like in my dishwasher or the sea or sea air.)
Anodising is carried out in a sulphuric acid bath, a cathode is mounted to the inside
Aluminium acts as anode
Loaded on carrier racks
-
Anodising is a highly controlled form of oxidation. There are 5 stages (8 really counting the rinsing!)
1 Cleaning to remove grease in an alkali bath, and rinse
2 Etching with caustic or acid bath, and rinse (called: de-smutting)
3 Anodising - current releases the oxygen which grows the anodised layer out of the surface - this generates a lot of heat and the electrolyte must be cooled to maintain the correct temperature.
Time in the bath regulates the thickness. Following this the anodised product is rinsed in de-ionised water to remove all minerals that could produce spotting in the final steps
4 Colouring. The newly created anodised surface is porous! And dies or pigments can be introduced.
5 Sealing. Finally, the pores must be sealed using a nickel acetate.
Thank you
Why we introduce porous to color the aluminum
Beautifully explained. Not just the "How", but also the WHY for each phase! Thank you
I do this for a living in but on a smaller scale. Crazy seeing parts that large being anodized.
What do you do?
I know. Their hoists and tanks are huge. Our operation is something I'm proud of, this is on another level though.
@@adityaniyogi330 anodizing but on a smaller scale
Yeah, Me too.Ours are only 11 ft. Tanks.
I think I work at the place in this video….
Awesome video. Precise, Clear with real visual making it easier to follow and understand. Well done.
No wonder I can't get my aluminum side back to factory finish...latex, acrylic and enamel paints don't produce this kind of finishes...
I worked for a small company that did anodizing --usually a black color. Sometimes if there was a missed spot o a part, the owner would get out the spray paint and touch it up!
This is not suppose to happen, why do you guys get spot? Bad water?
@@timcheou5649 I'm not sure. Perhaps the surface that was being held by the clip prevented contact with the anodizing solution.
@@timcheou5649 it's due to air trapped under the aluminum sections while in tank. Jig the sections at a good slope and see.
@@sebastianpinto347 Catching a bubble We call it.
Please tell me the anode mode: NaOH concentration, Temperature, H2SO4 concentration and current density. Thank you!
Hello thank you for explaining in depth, please guide how to test anodized thickness.
There's a meter we use at work. I'll check and message back when I get the name of it tomorrow.
We use DFT Meter ( eddy current based) for anodizing thickness cheking..
Micron meter
@@ace6001 it's called permascope
I’m an anodizing Team leader and this line compared to our line is small we produce 120,000 pounds of metal a day between 2 shifts.
How can i contact you?
Hi there. Love your work. I have a question regarding aluminum oxide. What chemicals or oxides can reduce aluminum oxide melting point if you heat them together in a crucible in a furnace? I know this auestion is not in par with the video above but I dont have your email address. I will appreciate your feedback
Cryolite - Na3AlF6 - That's why we use it as an additive in Hall-Beroult process
Great report with a very clear explanation, thank you!
Very well done. I thorough enjoyed this video and your explanation.
They do not use groundwater for this purpose..... do they? 😢 I hope they are first treating the wastewater and then using it for anodising........
Why do they need to use clean water? For harder finish?
We use well water in our cleaners but RO water in rinses, anodize tanks and seals. This helps eliminate hard water spots due to high iron in well water.
great content! any Anodizing process that would basically make the substrate Non-Magnetic? in other words, any “Type IV” version that when applied prevents Al-vs-Al interface from conducting electricity?
What is the purpose of the copper strap running the length of the workbar? Does this improve end to end color variation?
Still using humans instead of programing....
Why does it matter to you
Thanks for coming to Brazil and contaminating our rivers. Nice and clean!
Ya man, all lovely acids and suchlike.
I do this for a living. 5+yrs and we do this on an even slightly larger scale with tanks twice that size. I feel bad for the people that had to clamp all of that on! Those slide clamp bolts were pretty neat though
How can i contact you?
@@Alan-qe2jg what for?
I start working in one smal company.
Maybe you can help us with some advice.
Looks like parts of a window frame
I keep watching your videos
I did this for a living for a year. Racking sucks & it’s hard. It was cool to see parts from NASA though. Not a good paying job at my company anyways
Typically, what types of quality control methods of chemical analysis of the bath are used to optimise the process?
It looks not safely the way how they do it. We have in Holland 10 times better Anodizing at our Hydro Hoogezand
Would be nice to see ur plant, mime will get renovated, but atm probably ain't too great.
Thank you for this interesting industrial steps in anodizing. Coloring seem to give very likable appearance. In
What is meant by anodized
Hi Siri. When aluminium is anodized the surface is hardened. The result is a high performance, hardcoat surface. Read more here: www.hydro.com/en-us/profiles/aluminum-anodizing/
Tqs
The final thickness becoming 2X that of the base metal after anodizing, is it a standard value Or it varies?
Can you anodise steel
Numpang tanya dong kalau di panel calering alaram nya kabel regulator salah
Itu kira2 dmna nya ya
Tolong pencerahan nya
Awesome Video. Its always good to see Anodizing from start to finish. Grip6 has Buckles and Belts that are Anodized.
Good content to help us visualise and appreciate the process ..
Thanks
This is amazing, thank you for sharing
Great content. Clean & concise. Beauty 💯👌🤙
Thank you so much
uk based company
Holy shit I use to rack these parts up
How to do bright anodizing process
Is the surface hardness like that of corundum (Al2O3)?
yes, like that or sapphire
非常好视频
Thank you so much!
I'm loving it
Awesome vid
Where's hugbees
How to eliminate port air lock defect in anodised job
By proper racking/fixturing
@@dailydose9479 racking is hard. I worked in the anodizing department & i never full learned
Very nice
Good
good video, I'm just confused as to how you keep forgetting the second I in Aluminium.
american english lol i speak british english and i feel you
in american english its pronounced as aluminam in british it is aluminium
And the world sarcasm award goes to...
I dont mean to be offtopic but does any of you know of a way to get back into an Instagram account..?
I was dumb forgot the login password. I love any assistance you can give me!
@Xander Keagan Instablaster :)
What I see is waste water. How do they recycle it?
They run it through a filter press after neutralising the initial effluent that filters out the impurities etc leaving a cake that gets thrown into landfill (well that's what they do in the UK atleast)
@@seriousface116 Thank you.
Same for US as well.
You can to do all water (acid & alcaline) pH 6,5-8,5 and to add 1% flocculant. After membrane cleaning.. 50% water return in cycle
@@seriousface116 We do this to our Nickel preseals.
al beat kaha mileage
Which is possible in mild steel ?