Cruisers Forum

  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
Thread Tools Search this Thread Rate Thread Display Modes
Old 10-10-2016, 08:27   #16
Registered User

Join Date: Dec 2008
Posts: 21
Re: Copper-Plating Propellers

A yellow-metal propeller can be made of either a brass-related or a bronze-related alloy. In both cases, some minor amount of Cupper Ions leave the surface and stops the barnacles from attaching. BUT: As soon as a sacrificing anode is connected, it stops those Cupper Ions to be releases, and the barnacles will attach and grow.

It is only the seawater-resistant NiBrAl-alloys that are really good for seawater use, and for these alloys, no sacrificing anode is required. By this, they will release Cupper, and will not get much barnacles.

However, the brass-related alloys MUST have some form of sacrificing anode for protection, and as a result from that, they will get lots of barnacles.

In Sweden, SXK (Swedish Cruisers Organisation) have organized a series of trials where more than 30 different yellow-alloy alloys, both of the Brass and the NiBrAl-types, fixed blades and folding all have been electro-plated with Cupper to a thickness of about 0.2 mm, in combination with NOT using any Zinc Anodes.

Cupper is a little less noble than both the Brass:s, and the NiBrAl:s and since it surrounds these, no significant corrosion has been noted even for the Brass-oriented propellers (without Zinc anode).

So far the trials have been ging on for tree seasons without redoing the electro-plating. There has been no barnacles worth mentioning for any of the propellers during this timeframe, andd the treatment seems to last for at least a couple of more years still.
MagnusS is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Autostream Propellers - feedback? Weyalan Propellers & Drive Systems 37 19-06-2018 07:37
Flex-O-Fold Propellers vs Kiwi allsail68 Propellers & Drive Systems 87 06-06-2015 17:53
Propulsion System without Propellers seandepagnier Engines and Propulsion Systems 2 19-10-2009 09:22
Anti-Fouling Propellers Chief Engineer Propellers & Drive Systems 6 27-09-2009 22:05
Inboard Propellers? Gallivanters Propellers & Drive Systems 3 23-08-2006 20:51

Advertise Here

All times are GMT -7. The time now is 08:59.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.