finishing.com -- The Home Page of the Finishing Industry
Serious Education & the most FUN
you can have in metal finishing smiley

No popups, spam, registration or passwords
HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
topic 49642

Durability of Bright Dip anodizing vs Chrome Plating


A discussion started in 2008 but continuing through 2018

August 10, 2008

Q. I am starting a new company that will manufacture motorcycle grips. These are made of 6061 aluminum. I am looking for a bright and durable finish.

How durable is Bright Dip Anodizing versus Chrome Plating in an environment where they are handled on a daily basis? Are there any other options available?

Cost is not a concern.

Thank You.

Dave Nemergut
Product Desinger/Manufacturer - Lincolnton, North Carolina


August 12, 2008

A. Hi, Dave. If cost is not a concern, make them out of brass and chrome plate them :-)

Top quality chrome plating is a fabulous finish. Bright dip and anodize is a nice finish but it will be "white" whereas chrome is warmer and bluer. To my eye, aluminum, no matter how well done, looks cheaper. You might have some samples of each made and ask a few potential customers if they agree or disagree with my prejudice.

Since fingers are going to be on them, consider knurling them in some fashion so fingerprints will be less obvious than on flat expanses.

Regards,

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey


October 7, 2008

A. Never a truer word! Nothing beats Chrome, I'd like to suggest Glass Bead Blasting as another option to knurling, it looks awesome after plating.

Khozem Vahaanwala
Khozem Vahaanwala
Saify Ind supporting advertiser
Bangalore, Karnataka, India

saify logo



Anodizing or Chrome Plating? Need expert help

September 12, 2018

Q. Hi there,

I am a bit of an amateur/hobbyist and I have tried to search to the end of the internet, but haven't been able to find an answer to this question.

I am making an Aluminium 6061 body that needs to be "coated" with a non-stick/friction-free (as much as possible), corrosive resistant process, that can handle isopropyl alcohol and getting banged up a little.
Being able to be resistant to being dropped from a table on wood floor or concrete and keep its appearance over time, even though it has taken some "hits".

I am either looking into Chrome Plating or Type 3 Anodising. I would prefer to use the Chrome Plating purely because of aesthetics, but I am worried about the plating would get chipped over time and leave the aluminum underneath exposed to corrosion.

What do you guys think?

I do apologize if my terminology isn't on point and if I have left any factors out; I am not expert (yet) :-)

/Klaus

Klaus Hansen
Hobbyist - Hamburg, Germany


September 2018

A. Hi Klaus. If knocking it onto a concrete floor is going to be a reasonable expectation, it probably should be made of hardened steel, which won't dent, or of brass, which still looks classic even with scratches and scrapes in the plating :-)

But if it's to be made of aluminum, I'd suggest anodized aluminum, possibly infused with teflon for low friction. Chrome is a beautiful finish but it's cathodic to aluminum, so galvanic action will cause the aluminum to corrode if the chrome is scratched through and any aluminum is exposed. Plus, although we should always expect and demand quality, robust chrome plating of aluminum isn't easy and doesn't look much different from poor chrome plating early on.

Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey
Striving to live "Aloha"


September 21, 2018

A. Hi Klaus

For the case described, I would prefer Type 3 anodization (hard anodization). Chrome plating is not ideal for adhesion. And if damaged, the anodization behaves better.
Would recommend hard anodisation with PTFE (better gliding properties), layer thickness about 45 µm.
Base material EN AW-6061 or EN AW-6082 is equivalent (6082 is more available in Europe).

Joerg Beerli
AluSolutions - Hallau, SH, Switzerland


September 24, 2018

Q. Thank you so much Ted and Jeorg for your answers.

I think a Teflon infused anodizing is the way to go.

My second question is: if I want to go all the way with this product and die cast it with Aluminium, will the silica prevent me to anodize in after processing?

Looking forward to your answers.

Klaus Hansen
- Hamburg, Germany


September 2018

TUTORIAL FOR NEWBIES:

Please see our Intro to Anodizing for an introduction to "Type".

A. Hi. Diecast aluminum will invariably somewhat spoil the aesthetic appearance; it will be greyish, and probably mottled. But if that issue isn't overwhelming, most diecast can be anodized (if not Type III, at least "Type 2-1/2"). I am not sure, however, about Teflon infused type 2-1/2. A shop which offers that should probably be consulted before considering diecast.

Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey
Striving to live "Aloha"


September 26, 2018

A. Hi Klaus

A good quality for type 3 hard anodization are not suitable in the typical casting alloys. There is no uniform thickness. The layer is also rougher. Standard anodization (Eloxal) does not have the same quality in terms of hardness and friction / gliding. The best results are with rolled or extrusion material 6061/6082.

Joerg Beerli
AluSolutions - Hallau, SH, Switzerland



If you have a question in mind which seems off topic, please Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2018 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.