cleaning aluminum water tank - Page 2 - SailNet Community
Reply
 
LinkBack Thread Tools
post #11 of 19 Old 03-17-2009
Junior Member
 
Join Date: Jun 2007
Posts: 26
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Chlorinated water in aluminum tank

SailingDog: The area I'm in has a previous owner who told me he had flushed the tanks of my boat and left bleach in the tanks to shock them. He succeeded in shocking me too. I'm afraid this was his way of freshening up his tanks - a method that I will not be using in the future.
sorcerer33 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #12 of 19 Old 03-17-2009
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 18 Times in 14 Posts
Rep Power: 15
         
Properly used, chlorine bleach is perfectly safe for shock treating aluminum water tanks. It does have to be thoroughly rinsed from the tanks after doing so. It does not sound like the PO was doing that properly. Some municipalities use enough chlorine in their drinking water treatment to be a problem as well. That would just compound the problem of shock treating the tanks.
Quote:
Originally Posted by sorcerer33 View Post
SailingDog: The area I'm in has a previous owner who told me he had flushed the tanks of my boat and left bleach in the tanks to shock them. He succeeded in shocking me too. I'm afraid this was his way of freshening up his tanks - a method that I will not be using in the future.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #13 of 19 Old 03-17-2009
Bender of Nails
 
Join Date: Jan 2009
Location: West Coast BC
Posts: 66
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
 
You mentioned thorough cleaning because you couldn't get the tank out to replace it. Just a thought, but if you can access the top of the tank, you could cut an access opening and use the tank to support and protect a bladder.

Sealing it with epoxy is another option, but I don't have enough personal experience with that to comment on it. West System has some water tank info on their site and their info on other epoxy applications is pretty good.

"Verbosity leads to unclear inarticulate things"
~Dan Quayle
Deadeye is offline  
Quote Quick Reply Share with Facebook
post #14 of 19 Old 06-27-2010
Junior Member
 
Join Date: Jun 2010
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
aluminum tanks

I just had my aluminum hull cutter in the yard for bottom paint and zincs and was told by the yard manager they had an aluminum hull NOAA vessel in for hull repairs that had integral aluminum freshwater tanks. I was told that when calcium deposits cut off the oxygen to the metal it begins to corrode as happened to this vessel resulting in major repairs to the hull.
I pulled the inspection plate on my integral freshwater tank after hearing this and discovered (to my horror) what looked like seaweed in the tank. apparently when this boat was built or re-fit, a coating was sprayed inside the tank to possibly prevent calcium deposit build up??. I have owned the boat several years (A custom build, I am the 4th owner) and have been occasionally adding a cup or so of household bleach to the water to kill any bacteria. (big mistake!) Apparently the bleach dissolved most of the coating leaving quite a mess in the tank as well as some minor pitting of the tank walls. So I have a similar (or worse) situation. My tank also cannot be removed. To clean it will be difficult due to baffels and the only access is the inspection plate (about 18" X 24"). Going in through the outside hull is also near impossible due to an encapsulated concrete filled ballast keel. (the tank is 40Gal centerlined amidships) The only way I see to access it is by removing the cabin sole above the tank (nicely done teak & cherry) Then I think the best option is sand or soda blast to clean and remove the pitting. From what I have learned as long as oxygen is present and calcium not allowed to build up the tank will last.
I also admit to not being an expert in electrollisis (I cant even spell it!) and corrosion in aluminum before buying a boat with aluminum tankage.

Any advise or suggestions would be appreciated.
CapitanDon is offline  
Quote Quick Reply Share with Facebook
post #15 of 19 Old 06-27-2010
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 18 Times in 14 Posts
Rep Power: 15
         
While you'd be better off starting your own thread... I'd point out that adding chlorine bleach to your water system on a regular basis is a really bad idea if you have an aluminum tank... I would highly recommend discontinuing the practice. Chlorine bleach attacks the aluminum.

Cutting open the tank and replacing it with flexible bladder or a custom plastic tank might be better options than trying to clean and restore this tank. Without knowing how serious the pitting is, there is no way to see how severe the damage to the tank is, and trying to salvage the tank may just increase your costs overall.

Quote:
Originally Posted by CapitanDon View Post
I just had my aluminum hull cutter in the yard for bottom paint and zincs and was told by the yard manager they had an aluminum hull NOAA vessel in for hull repairs that had integral aluminum freshwater tanks. I was told that when calcium deposits cut off the oxygen to the metal it begins to corrode as happened to this vessel resulting in major repairs to the hull.
I pulled the inspection plate on my integral freshwater tank after hearing this and discovered (to my horror) what looked like seaweed in the tank. apparently when this boat was built or re-fit, a coating was sprayed inside the tank to possibly prevent calcium deposit build up??. I have owned the boat several years (A custom build, I am the 4th owner) and have been occasionally adding a cup or so of household bleach to the water to kill any bacteria. (big mistake!) Apparently the bleach dissolved most of the coating leaving quite a mess in the tank as well as some minor pitting of the tank walls. So I have a similar (or worse) situation. My tank also cannot be removed. To clean it will be difficult due to baffels and the only access is the inspection plate (about 18" X 24"). Going in through the outside hull is also near impossible due to an encapsulated concrete filled ballast keel. (the tank is 40Gal centerlined amidships) The only way I see to access it is by removing the cabin sole above the tank (nicely done teak & cherry) Then I think the best option is sand or soda blast to clean and remove the pitting. From what I have learned as long as oxygen is present and calcium not allowed to build up the tank will last.
I also admit to not being an expert in electrollisis (I cant even spell it!) and corrosion in aluminum before buying a boat with aluminum tankage.

Any advise or suggestions would be appreciated.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #16 of 19 Old 09-16-2010
S/V Sabbatical
 
Snboard976's Avatar
 
Join Date: Aug 2008
Posts: 111
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
I wonder if I'm looking at aluminum oxide or calcium deposits in my aluminum tank? Removing the tank is not an option - teak & holly floor would have to be removed as well as sink cabinetry etc. Baffles in the tank make installation of a liner or bladder near impossible. I was told by someone with a knowledge of chemistry to use the product that is placed in a shower and sprays automatically to kill mold. He also said hot water was the best wash to use.

Chad Gleason
s/v Sabbatical Pearson 365 Hull #32

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Snboard976 is offline  
Quote Quick Reply Share with Facebook
post #17 of 19 Old 09-16-2010
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 18 Times in 14 Posts
Rep Power: 15
         
What do the deposits look like? Aluminum oxide is usually a greyish color... but tends not to form except as a layer coating the metal. If the deposits are collecting, it is likely aluminum chloride instead, which is often a whitish powder.

Many of the products that are used to kill mold/mildew are not safe for use in potable water systems.

Quote:
Originally Posted by Snboard976 View Post
I wonder if I'm looking at aluminum oxide or calcium deposits in my aluminum tank? Removing the tank is not an option - teak & holly floor would have to be removed as well as sink cabinetry etc. Baffles in the tank make installation of a liner or bladder near impossible. I was told by someone with a knowledge of chemistry to use the product that is placed in a shower and sprays automatically to kill mold. He also said hot water was the best wash to use.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #18 of 19 Old 12-27-2010
Junior Member
 
Join Date: Dec 2010
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Now, This is becoming very important to get installed a rain water tank in a house to save the water and making the country save and secure in future.

water tank
wenger230 is offline  
Quote Quick Reply Share with Facebook
post #19 of 19 Old 12-27-2010
Senior Member
 
mitiempo's Avatar
 
Join Date: Sep 2008
Location: Victoria B.C. Canada
Posts: 7,765
Thanks: 0
Thanked 109 Times in 100 Posts
Rep Power: 10
   
Were you looking for a sailing forum?

Brian
Living aboard in Victoria Harbour
mitiempo is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
water ballast musolmar Boat Review and Purchase Forum 8 09-26-2004 05:50 PM
removing orig water tank zeilfanaat Gear & Maintenance 6 04-12-2004 07:26 AM
aluminum water tank CISCOJOE Gear & Maintenance 4 07-15-2002 07:56 AM
fresh water tank, tastes like ****! nauticalrich Gear & Maintenance 6 05-24-2002 05:17 PM
Water Ballast/Manufacturer RSJ Boat Review and Purchase Forum 6 03-07-2002 06:59 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome