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

HomeFAQsBooksHelpWantedAdvertiseForum
topic 8933

Problems with rate of electroplating


(2001)

Q. I am a student at Heriot-Watt University, Edinburgh, UK. I am in my final year and I am doing a project concerning electroforming. I am comparing quality and characteristics of electroformed components using DC and pulsed current.

I am currently having problems working out rates of plating, so that I can calculate the thickness of metal plated.

I am trying to electroplate an area of about 4 cm * 4 cm, with this area there is a small area in the centre which has been formed using the UV-LIGA process to make a "mould" to create the metal component. I wish to "fill" this mould and remove it to leave an electroformed object.

I am plating with Nickel in a DC bath initially. The thickness I require are in the region of 40-70 micrometers. The bath is at 50 °C, with a pH of around 2.5, and the current being used is in the region of 20-40 mA. I am plating onto a Cu/Cr layer which is very thin, only a few micrometers.

Any advice or help would be greatly appreciated.

Philip Manson
- UK


(2001)

A. I would use basic Faraday's law. Nickel should plate 1.095 grams per Amp Hr or 19 Amp Hr required to plate 0.001 inch deposit for 1 sq ft area. Nickel will have 95 to 97% efficiency. Calculate area, check current density and use Amp timer to estimate. You can weigh deposit too. ( before and after plating)

Good luck.

Payal Mag
- Charlotte, North Carolina



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 This Week's HOT 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.