Author Topic: Hard anodizing  (Read 907 times)

gavin kidwell

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Hard anodizing
« on: October 03, 2020, 12:42:32 PM »
Wondered if anyone has any knowledge on hard anodizing alloy engine plates and brake torque arms and the risks of enbrittlement. thanks

Simon Collins

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Re: Hard anodizing
« Reply #1 on: October 03, 2020, 03:17:57 PM »
What are you wanting to do it for? Cosmetic purposes? The process is for wear resistance generally. Embrittlement is a concern where stress levels are high which depend on load and fatigue cycles relative to shape/geometric form, how many others holes you have drilled in them to lighten them etc etc.

gavin kidwell

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Re: Hard anodizing
« Reply #2 on: October 03, 2020, 05:30:16 PM »
so i dont have to clean them as much. didnt really want bare alloy.

Simon Collins

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Re: Hard anodizing
« Reply #3 on: October 03, 2020, 09:25:27 PM »
I wouldn't bother on a race bike or any other. Unless you are going to use in salt environment then mucoff, solvol or petrol and let it slowly self anodising to a dull ali finish so no need to polish a much.

John Conroy

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Re: Hard anodizing
« Reply #4 on: October 03, 2020, 11:54:25 PM »
Do not argue with an idiot. He will drag you down to his level and beat you with experience.

Tony Edwards

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Re: Hard anodizing
« Reply #5 on: October 04, 2020, 06:59:00 AM »
Hard anodising does not give the same corrosion protecting as standard Chromic or sulphuric acid anodising. It is for wear resistance and can be impregnated with such chemicals as teflon etc.
If you want a cosmetic protection then sulphuric acid anodising can be dyed with almost any colour you want, you can dye a chromic acid coating but only with  dark colours as its' natural colour is quite dark whereas sulphuric is opaque.

Simon Collins

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Re: Hard anodizing
« Reply #6 on: October 04, 2020, 02:08:21 PM »
Also if you anodise aluminium with dye or not it will show quite diiferently every type of surface finish and irregularity unless it is finished with the same process.