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Hull Cell Questions
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Dear Sr. :
I have two questions about Hull cell :
Using the current density equation of the Hull cell ( C : I ( 5,1 - 5,25 log x) ) , There are an infinite currents that might be use ( usually described as 1,2, and 3 A ). I Need to evaluate additives between 200 and 500 Ampere per square meter.
Q1 : Which current should I work with the hull cell.
Q2 : What time of deposition should be use.
Sincere regards.
Peter HolmespH SA - Antofagasta, II Region, Chile
First of three simultaneous responses -- ++++
It might help if you would tell us about the plating bath you want to evaluate...
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James Totter, CEF - Tallahassee, Florida |
Second of three simultaneous responses -- ++++
Dear Mr. Holmes:
You need to be more specific in your question.
Hull Cell can be applied to many electroplating processes, with different purposes.
Oscar Infante- Santiago, Chile
Third of three simultaneous responses -- ++++
Applied current and testing time all depend on what you are testing in the Hull Cell. There are set conditions for different plating systems, details of which can be found in any reputable book that discusses the Hull Cell. Try The Canning Handbook. No-one can answer your query unless you say what you are doing.
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Trevor Crichton R&D practical scientist The Pheasantries - Chesham, U.K. |
+++++
How do you read the hull cell ruler? it is stated from the ruler that it has 1, 3, 5 Amps. how much time should you use?1 min or more?
We are currently using SnPb chemistry for ic packaging. I'm a bit confuse as to how to read the ruler. I'm currently using 3 Amps 2 min. when I read the result using the ruler, I use the 3 amp portion and multiply the Current Density by 2..is this right? we are using
10-20 ASD meco plating machine.
I hope you guys can answer this question the soonest. thanks in advance!
semiconductors - Laguna, Philippines
December 19, 2011
Hello,
Hull-cell current to be employed depends on the type of plating you are investigating and the average current density and maximum operating current density you are likely to encounter in the production tank.The purpose of the Hull cell experiment is to know the plating quality at different current densities in single test.Generally,for vat plating it is customary to use 5 amps and 10 minutes to get the test result. 5 amps will give a range of 0-200 amps/sq.ft current density.This range,I think will be sufficient for most of the decorative or commercially useful applications.
Good Luck!
Ramajayam
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Subramanian Ramajayam consultant Bangalore, Karnataka, India |