Login | Register
The Engineer's Place for News and Discussion®

Previous in Forum: y to save electical energy?   Next in Forum: blackout & brownout
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
8 comments
Subscribe Rate this Comments: Nested
Anonymous Poster

Something better than tungsten

05/19/2007 3:51 PM

Hello,

I need a metal for an electrode that is nearly not corroding. It has to work under hight temperatures, under water and that is not good for something that is corroding easily. tungsten is not strong enough, after 1 hour the rod was gone.I I heard that palladium is good, but I have not enough money for things like palladium or something like that. Can someone help me?

my tungsten after 30 minutes
Reply
Pathfinder Tags: Corrosion high temperature metal Tungsten
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Anonymous Poster
#1

Re: something better than tungsten

05/19/2007 3:58 PM

What is this doing and under water fresh or saline? What sort of power Voltage Current? In other words what is the application of the electrode?
Reply
Anonymous Poster
#2
In reply to #1

Re: something better than tungsten

05/19/2007 4:20 PM

It is salt water an 220 volt the tungsten is glowing under water.
Reply
Anonymous Poster
#3

Re: Something better than tungsten

05/19/2007 9:35 PM

If the electrode is being used in an electrode boiler then contact the original equipment manufacturer for advice and spare parts.
Reply
vermin
Guru

Join Date: Jul 2006
Location: Silicon Valley
Posts: 5458
Good Answers: 39
#4

Re: Something better than tungsten

05/20/2007 2:45 AM

You may want to experiment with stainless steel. However, if electrolysis is going on, the only thing I know that won't be dissolved by the reaction is one of the platinum metals.

__________________
The heel of the boot of the upper-class belongs on the throat of the middle class. - Lucious Prn
Reply
Anonymous Poster
#5

Re: Something better than tungsten

05/20/2007 2:56 AM

Tungsten oxidises far too easily at high temperatures. Try Nichrome, the chrome content forms a strong oxide layer and prevents further oxidation.
Reply
Rager
Associate

Join Date: Apr 2007
Posts: 30
#8
In reply to #5

Re: Something better than tungsten

05/20/2007 10:05 AM

Does Nichrome exist as a rod?

__________________
The world is a free place for free minds!
Reply
garth
Guru
Australia - Member - New Member Engineering Fields - Mechanical Engineering - New Member

Join Date: Sep 2006
Location: NSW Australia
Posts: 1012
Good Answers: 22
#6

Re: Something better than tungsten

05/20/2007 4:25 AM

It looks like it is being stripped rather than corroded.

What is the function of your operation?

Are you using 220 Volt AC or DC??

__________________
Dont get on to the roundabout if you dont know how to get off
Reply
Anonymous Poster
#7

Re: Something better than tungsten

05/20/2007 6:21 AM

Why are you using tungsten? Are you welding something? Generating hydrogen? Carbon electrodes work just fine under water, last a long time, and are cheap to replace.
Reply
Reply to Forum Thread 8 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Copy to Clipboard

Users who posted comments:

Anonymous Poster (5); garth (1); Rager (1); vermin (1)

Previous in Forum: y to save electical energy?   Next in Forum: blackout & brownout
You might be interested in: EDM Electrode Materials, Electrical Contact and Electrode Materials, Tungsten and Tungsten Alloys


"Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great." -- Mark Twain

All times are displayed in US/Eastern (EDT) (Register to change time zone)

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

Search all of CR4
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds
CR4 Store

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (171 right now)
Show Members