finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsSuggested
Books
Help
Wanteds
Advertise
Here
FORUM
(current
topics)
topic 5424

What is the Thickness of Zinc Plate from an Acid Based Plating Process?


(2000)

We currently have some parts that are manufactured from 1010 steel and are zinc plated per ASTM B633 [link by ed. to spec at TechStreet] Fe/Zn 25 type II (minimum plating thickness .001"). Our current plater called to inform us that he is changing his plating bath from alkaline to acid chloride. He says with the new bath he can only plate .0002 - .0004" thick. Is this true for all acid chloride baths? Is this the current trend for zinc platers?

If it is so, we would have to consider changing our thickness requirements, but we need the corrosion resistance of the thicker zinc plate.

Eileen Clevenger
aircraft engine systems - Rockford, Illinois USA


(2000)

Since I don't know your part, etc., I can't be sure, but, historically, acid zinc baths suffer from low throwing power. Depending upon the part shape, this may be what is limiting your supplier.

James Totter
James Totter, CEF
- Tallahassee, Florida


(2000)

Chloride zinc baths can plate 0.001" thicknesses. The problems with this thick of a deposit is twofold. First, chloride zinc does not have good distribution; meaning the high current density (HCD)areas will plate much faster than the low current density (LCD)areas. If your 0.001" requirement is for a LCD, then the HCDs will have a thickness of 0.003 - 0.004". Second, due to the organics in the chloride zinc formula, thick chloride zinc deposits are prone to chipping. I would suggest you find another plater in the area who does alkaline zinc plating.

Rick Painter
- Cleveland, Ohio


(2000)

I would like to think that your plater has a reason for moving from Alkaline to Acid Zinc, and you can plate the thickness you require with lower current, longer times and assisted by Air or Cathode agitation, without altering your spec for less thickness. We use both the systems and each has its own pros and cons.

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

saify logo



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A 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


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.