Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 02-04-2012, 08:06   #106
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: Blisters !!!!! Is it Osmosis ??????

Quote:
Originally Posted by psneeld View Post
The problem with thinking blisters and not hydrolysis is that huge potions of many boats are possibly starting to delam (like mine) when the blisters don't seem too bad and the surveryor didn't catch it.

Then the unsuspecting new owner of a boat pops a few blisters, fixes them, slaps on some more bottom paint and heads for the islands where the warm water all year long is dissolving more and more resin and the delam is getting worse and worse.

Here's some laminate that much of it I could pull off by hand due to it's almost dry of resin yet didn't show up as delam yet to a tapping hammer..






Classic result of hydrolysis. This is why saturation is a bad thing.
__________________

__________________
minaret is offline   Reply With Quote
Old 25-04-2013, 09:55   #107
Registered User

Join Date: Apr 2013
Boat: John G. Alden 44
Posts: 15
Images: 9
Re: Blisters! Is it Osmosis?

Those who want to get rid of the hydrolysis products such as styrene and propylene glycol (apparently the culprits of osmosis) might try a homemade Hotvac. It's a tedious process as I've got only two heating mats but we are very happy with it and it works nicely (a total drying per square meter takes between 5 to 10 hours).

What's convenient about the custom made mats: The RAYCHEM self regulating heating cable sealed within the RPDM rubber mats heat resistant never exceeds (even partly) the max. temperature of 110C (depends on the cable you choose, of course).

Regards,
Volker
__________________

__________________
Crayfish is offline   Reply With Quote
Old 25-04-2013, 12:12   #108
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: Blisters! Is it Osmosis?

Quote:
Originally Posted by Crayfish View Post
Those who want to get rid of the hydrolysis products such as styrene and propylene glycol (apparently the culprits of osmosis) might try a homemade Hotvac. It's a tedious process as I've got only two heating mats but we are very happy with it and it works nicely (a total drying per square meter takes between 5 to 10 hours).

What's convenient about the custom made mats: The RAYCHEM self regulating heating cable sealed within the RPDM rubber mats heat resistant never exceeds (even partly) the max. temperature of 110C (depends on the cable you choose, of course).

Regards,
Volker

Excellent advice. Welcome to CF.
__________________
O you who turn the wheel and look to windward,

Consider Phlebas, who was once handsome and tall as you.
minaret is offline   Reply With Quote
Old 25-04-2013, 12:23   #109
Registered User

Join Date: Apr 2013
Boat: John G. Alden 44
Posts: 15
Images: 9
Re: Blisters! Is it Osmosis?

Thank you!

Here are some pictures and a graph of the poiling points in vacuum of water, Styrene and Propylene Glycol (the graph is not new to you, I assume).

Volker
Attached Thumbnails
Click image for larger version

Name:	GEDC0010.JPG
Views:	103
Size:	242.0 KB
ID:	59890   Click image for larger version

Name:	GEDC0020.JPG
Views:	99
Size:	257.0 KB
ID:	59891  

Click image for larger version

Name:	GEDC0015.JPG
Views:	96
Size:	261.8 KB
ID:	59892   Click image for larger version

Name:	boilingpoints.jpg
Views:	99
Size:	67.6 KB
ID:	59893  

__________________
Crayfish is offline   Reply With Quote
Old 25-04-2013, 12:36   #110
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: Blisters! Is it Osmosis?

Quote:
Originally Posted by Crayfish View Post
Thank you!

Here are some pictures and a graph of the poiling points in vacuum of water, Styrene and Propylene Glycol (the graph is not new to you, I assume).

Volker


Far from it. Do a forum search and you will note that pretty much every reference here to Hotvac is by me. Been using it for a decade.
__________________
O you who turn the wheel and look to windward,

Consider Phlebas, who was once handsome and tall as you.
minaret is offline   Reply With Quote
Old 25-04-2013, 13:53   #111
Registered User

Join Date: Apr 2013
Boat: John G. Alden 44
Posts: 15
Images: 9
Re: Blisters! Is it Osmosis?

Quote:
Originally Posted by minaret View Post
Far from it. Do a forum search and you will note that pretty much every reference here to Hotvac is by me. Been using it for a decade.
I know.

Regards
Volker
__________________
Crayfish is offline   Reply With Quote
Old 25-04-2013, 16:18   #112
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: Blisters! Is it Osmosis?

Quote:
Originally Posted by Crayfish View Post
Thank you!

Here are some pictures and a graph of the poiling points in vacuum of water, Styrene and Propylene Glycol (the graph is not new to you, I assume).

Volker
Quote:
Originally Posted by Crayfish View Post
I know.

Regards
Volker

I believe you would be doing the English speaking boating world a favor if you reproduced this info in its own thread here.
__________________
O you who turn the wheel and look to windward,

Consider Phlebas, who was once handsome and tall as you.
minaret is offline   Reply With Quote
Old 26-04-2013, 06:22   #113
Registered User

Join Date: Apr 2013
Boat: John G. Alden 44
Posts: 15
Images: 9
Re: Blisters! Is it Osmosis?

Quote:
Originally Posted by minaret View Post
I believe you would be doing the English speaking boating world a favor if you reproduced this info in its own thread here.
I'll try.
__________________

__________________
Crayfish is offline   Reply With Quote
Reply

Tags
blisters, osmosis

Thread Tools
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
And So it Begins . . . Knottybuoyz' New Project knottybuoyz Construction, Maintenance & Refit 1329 28-08-2017 14:26
Is a Pearson P-30 a Good Safe Boat for Open Ocean ? danniel24 General Sailing Forum 12 11-07-2015 06:39
Blisters! Is it Osmosis? sepeteus Monohull Sailboats 112 26-04-2013 06:22
Crew Available: Hi, matt is my name. Looking to get aboard! Matthew79 Crew Archives 4 04-04-2012 00:59
Now THIS is a Collision ! Rakuflames Navigation 28 03-04-2012 08:45



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 21:58.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.