Search found 2180 matches

by Chaps
Sat Nov 21, 2020 1:57 am
Forum: Alloy Boat Forum
Topic: Hello.. new member and need assistance
Replies: 10
Views: 440

Re: Hello.. new member and need assistance

Wet would work, I've used them. you can also pickup a hand held blaster to shoot dry but you need a good sized compressor to power one of those.
by Chaps
Fri Nov 20, 2020 2:10 am
Forum: Alloy Boat Forum
Topic: Hello.. new member and need assistance
Replies: 10
Views: 440

Re: Hello.. new member and need assistance

Pitting under flotation foam is typically caused by the trapped moisture in contact with the hull becoming anaerobic (lacking oxygen) and providing an environment conducive to a form of bacteria that produces an acid that eats the metal, a process sometimes referred to as biocorrosion. To save your ...
by Chaps
Sat Oct 31, 2020 11:25 pm
Forum: Alloy Boat Forum
Topic: Identifying a Boat- Long Shot
Replies: 4
Views: 840

Re: Identifying a Boat- Long Shot

There have been so many alloy boat builders here in Seattle over the years that have either gone under, been absorbed by bigger firms or been bought out and renamed that its anybody's guess who might have built that boat. That said, my guess would be Kvichak (now Vigor owned I believe) as they have ...
by Chaps
Mon Oct 26, 2020 3:40 am
Forum: Your Alloy Boat
Topic: How serious is this corrosion?
Replies: 13
Views: 1216

Re: How serious is this corrosion?

I bottom paint lots of aluminum boats here in the Seattle area. Unless the pitting is quite deep (per Kevin) that is a manageable situation. Primarily, it appears that the boat has never been fitted with proper sacrificial anodes. The one anode I see on the transom looks like it is made out of zinc ...
by Chaps
Sun Jun 21, 2020 7:11 pm
Forum: Share your Projects and Creations
Topic: Corrosion resistance products
Replies: 3
Views: 1266

Re: Corrosion resistance products

You can't overprotect with aluminum anodes, put on as many as you want with no harm done but putting on more than you need is pointless. Overprotection occurs when there is a major difference in galvanic potential between the anode and what you want to protect keeping in mind that the conductivity o...
by Chaps
Sun Jun 21, 2020 9:29 am
Forum: Share your Projects and Creations
Topic: Corrosion resistance products
Replies: 3
Views: 1266

Re: Corrosion resistance products

"Also considering putting in a small anode (aluminum) in the inside of the wet area of the bilge to a frame member."

Good idea
by Chaps
Sun Mar 15, 2020 9:31 pm
Forum: Alloy Boat Forum
Topic: Anode zinc magnesium or aluminum ?
Replies: 2
Views: 2660

Re: Anode zinc magnesium or aluminum ?

Anodes are meant to be sacrificial but that one didn't get the memo! Zinc anodes don't do a very good job protecting aluminum boats, there isn't enough difference in the galvanic potential between a zinc anode and typical marine plate alloy so the zinc doesn't respond, particularly when they get old...
by Chaps
Thu Mar 12, 2020 10:51 pm
Forum: Welcome New Members
Topic: New member. Need help on sanding a hull
Replies: 4
Views: 4133

Re: New member. Need help on sanding a hull

Where are you located?
by Chaps
Mon Mar 09, 2020 1:15 am
Forum: Sittin' on the Dock
Topic: Inside of 1979 aluminum diesel tank
Replies: 2
Views: 3567

Re: Inside of 1979 aluminum diesel tank

That diesel gets nasty!
by Chaps
Mon Mar 09, 2020 1:11 am
Forum: Welcome New Members
Topic: New member. Need help on sanding a hull
Replies: 4
Views: 4133

Re: New member. Need help on sanding a hull

Philippe, media blasting can create a uniform appearance very quickly but most products are gritty and will leave the surface profiled (resembling sandpaper in roughness). If you can find a blasting contractor that offers a process called sponge blasting they have a media that can put a dull satin t...
by Chaps
Sun Feb 16, 2020 1:31 am
Forum: Alloy Boat Forum
Topic: Zinc Chromate Primer
Replies: 11
Views: 6006

Re: Zinc Chromate Primer

I'd switch over to aluminum anodes and call it good. How'd you end up with an Edwing bowpicker way back there? Outdrives?
by Chaps
Fri Feb 14, 2020 2:39 am
Forum: Sittin' on the Dock
Topic: Anyone knowledgeable in concrete removal?
Replies: 3
Views: 3063

Re: Anyone knowledgeable in concrete removal?

That is a neat device. Only thing I can think of is to use concrete anchor bolts. drill holes, pound them in, thread on a lift ring and lift out with a forklift. 18" thick slab is scary heavy per sq ft, have to find pretty strong anchors. you could sell them with the rings for mooring ball anchors a...
by Chaps
Fri Feb 14, 2020 2:23 am
Forum: Alloy Boat Forum
Topic: Zinc Chromate Primer
Replies: 11
Views: 6006

Re: Zinc Chromate Primer

Couple of questions . . . Are you experiencing any corrosion or pitting on your hull that has you concerned? If yes, is it a recent problem? Are you using a zinc hull anode? Do you ever plug into shore power? Is the anode on your engine getting used up rapidly?
by Chaps
Tue Dec 31, 2019 1:56 am
Forum: Welcome New Members
Topic: 24 foot boat build for Northwest
Replies: 6
Views: 3838

Re: 24 foot boat build for Northwest

Crozier might be a good fit, they do semi-custom walk around sleeper cabins with beach access doors
by Chaps
Sun Dec 29, 2019 3:29 am
Forum: Alloy Boat Forum
Topic: Corrosion on anode
Replies: 9
Views: 5162

Re: Corrosion on anode

That's the right anode, looks like it lost its connection to the hull. Clean it to bright metal, clean the mount hardware & clean the mount location. Make sure everything is tight when you put it back on.
by Chaps
Sun Dec 29, 2019 3:21 am
Forum: Alloy Boat Forum
Topic: How to repair areas of corrosion & electrolysis
Replies: 3
Views: 4106

Re: How to repair areas of corrosion & electrolysis

Well electrolysis is far to serious a malady to describe anything you have got going there. After 40 years not surprising to have a few spots of corrosion from some ownership issues. Any of these areas actual below waterline hull plating or just inner structure?
by Chaps
Mon Dec 23, 2019 7:54 pm
Forum: Alloy Boat Forum
Topic: Corrosion on anode
Replies: 9
Views: 5162

Re: Corrosion on anode

Agree with Kevin, typical flat stock won’t be reactive enough to work properly. Get 6x6 alum anode plates from boatzincs.com just drill holes they have the right alloy specs and won’t get that growth
by Chaps
Tue Dec 17, 2019 3:11 am
Forum: Alloy Boat Forum
Topic: Corrosion on anode
Replies: 9
Views: 5162

Re: Corrosion on anode

Well it certainly needs to be removed and cleaned (acid dipped or sand blasted) to see its true condition and to evaluate why it is not performing properly. If it is zinc (and it looks like it probably is) toss it and replace it with an aluminum anode. Is the outboard anode wasting away kind of rapi...
by Chaps
Mon Nov 11, 2019 2:14 am
Forum: Sittin' on the Dock
Topic: Garden hose spray nozzle-
Replies: 7
Views: 4140

Re: Garden hose spray nozzle-

The problem with most of them is the handles snap off easily if you drop them or if you hook them on something and jerk on the hose they break. This one I found at home depot and it has a thumb actuated lever that doesn't get caught on anything, so far so good, it's pretty tough. orbit-nozzles-wands...
by Chaps
Mon Jul 22, 2019 12:16 am
Forum: Aluminum Boats For Sale
Topic: 1991 22 foot Bayrunner $12,000
Replies: 4
Views: 7113

Re: 1991 22 foot Bayrunner $12,000

post is almost 10 years old, I bet he sold it!
by Chaps
Tue Jul 16, 2019 9:43 pm
Forum: Alloy Shop Talk
Topic: Building floors from larch wood
Replies: 7
Views: 4909

Re: Building floors from larch wood

kudos Kevin
by Chaps
Tue Jul 16, 2019 4:32 am
Forum: Alloy Shop Talk
Topic: Building floors from larch wood
Replies: 7
Views: 4909

Re: Building floors from larch wood

Kevin . . . why so rough? It's not like we are swamped with new members on this forum.
by Chaps
Wed Jul 10, 2019 10:08 am
Forum: Alloy Boat Forum
Topic: New to aluminum boats
Replies: 4
Views: 2816

Re: New to aluminum boats

Clean it with whatever you like, can't hurt it. Depends on type of growth you get but typically dawn detergent with a shot of bleach works good. If you get hard scale then try Mary Kate On-Off acidic cleaner (don't mix that with anything other than water)
by Chaps
Mon Jun 24, 2019 5:06 am
Forum: Alloy Boat Forum
Topic: 26’ Cat or 28’Monohull
Replies: 14
Views: 5101

Re: 26’ Cat or 28’Monohull

The roll and ride are not similar, cats don't roll which is nice but they also lean out in turns which I didn't care for in the 27 cat I once owned. The mono will have more storage space and more useable interior space than the cat which would be more practical for cruising. The cat will be very man...