Search found 1331 matches

by kmorin
Fri Apr 20, 2018 12:36 am
Forum: Your Alloy Boat
Topic: Almar 22 sounder repower
Replies: 9
Views: 679

Re: Almar 22 sounder repower

harcher, please go slow on a re-balance and ballast? You won't want to add ballast if it's not needed and until you feel the boats roll moment (side to side) with some real loads- I'd caution that adding ballast, now, was premature. Swapping out engines, going to an outboard leg - mounted aft and no...
by kmorin
Thu Apr 19, 2018 11:26 am
Forum: Alloy Boat Forum
Topic: New From My Shop
Replies: 2
Views: 159

Re: New From My Shop

Yofish, in keeping with your policy of brevity, a single image post just leaves me with more questions than answers. So, just in case you feel inclined to share a bit more about the design and build? I'll ask some of the questions that this image brings to my mind? Starting with the trailer- not a b...
by kmorin
Fri Mar 23, 2018 12:06 pm
Forum: Alloy Shop Talk
Topic: aluminum prices????
Replies: 6
Views: 489

Re: aluminum prices????

We just ordered a 32' in sheet goods; mainly 1/4". While we pay lots of frt to get the metal to Alaska, so 3$-4/lb is not new here, we were told the PNW tariff cost increases were about 2weeks out, so figured inventory would be hit hard (and it's spring too) and ordered. The skipper decided to buy n...
by kmorin
Fri Mar 23, 2018 12:02 pm
Forum: Alloy Boat Forum
Topic: Black Water Tank Sending Units
Replies: 13
Views: 299

Re: Black Water Tank Sending Units

Bob, It looks like the float type with the stilling wells installed over the float- to allow liquids only into the well solves the black water challenges of mixed solids in the measured column? So that looks like a simple and easy to install solution? But, on a related topic as a note about sensor s...
by kmorin
Thu Mar 22, 2018 4:29 pm
Forum: Alloy Boat Forum
Topic: Black Water Tank Sending Units
Replies: 13
Views: 299

Re: Black Water Tank Sending Units

quick link to a paper/pdf on the types of sensors, that may be useful in tracking down a vendor?
http://www.gilsoneng.com/reference/Levelpap.pdf

cheers,
Kevin Morin
Kenai, AK
by kmorin
Thu Mar 22, 2018 12:28 pm
Forum: Alloy Boat Forum
Topic: Black Water Tank Sending Units
Replies: 13
Views: 299

Re: Black Water Tank Sending Units

ehsvp, Krisinak, something like this technology may be worth checking out? https://senix.com/ultrasonic-tank-level-sensor-applications/ the non-contact but corrosive atmosphere in a black water tank may well be a good app for this type level sensor? I don't know their product well enough to say thei...
by kmorin
Wed Mar 21, 2018 12:00 pm
Forum: Alloy Boat Forum
Topic: Electrical precautions when welding on hull
Replies: 6
Views: 464

Re: Electrical precautions when welding on hull

MacCTD, that's definitely a pure 5356 alloy filler show- MIG or TIG.

cheers,
Kevin Morin
Kenai, AK
by kmorin
Tue Mar 20, 2018 7:04 pm
Forum: Alloy Boat Forum
Topic: Electrical precautions when welding on hull
Replies: 6
Views: 464

Re: Electrical precautions when welding on hull

MacCTD, there is a new FILLER alloy (a few years old?) that does not have wide acceptance yet, but does show promise in some parent metal alloys' joining by welding. If the welding work is done on 6061 alloy extrusions -welding to 5086 (or 5052) then I'll mention 4943 alloy filler because of recent ...
by kmorin
Tue Mar 20, 2018 9:50 am
Forum: Alloy Boat Forum
Topic: Electrical precautions when welding on hull
Replies: 6
Views: 464

Re: Electrical precautions when welding on hull

MacCTD,
the most widely accept welding filler alloy for 5086 and 5052 is; 5356, for both TIG and MIG processes.

Cheers,
Kevin Morin
Kenai, AK
by kmorin
Mon Mar 19, 2018 4:14 pm
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 21
Views: 1019

Re: Recent Chine Extrusion Experience

Chaps, looking at the topsides in your posted pic about the chine pitting (just above of the older project) makes me think there may have been more serious corrosion issues on that particular boat? In the first chine pic (several posts above) the corrosion excavation seems confined to the chine extr...
by kmorin
Mon Mar 19, 2018 2:12 am
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 21
Views: 1019

Re: Recent Chine Extrusion Experience

Chaps, I see the pitting as you're observing it. I wonder if the effect is opposite of your observation? I see a TIG weld aft the topsides to chine and wonder if THAT was high enough heat to affect the extrusions' properties... but... the MIG weld inside the chines' was NOT? What I'm driving at is t...
by kmorin
Sun Mar 18, 2018 11:51 pm
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 21
Views: 1019

Re: Recent Chine Extrusion Experience

Chaps, very well written review of the circumstance. Why this bit of physics is so elusive to builders, designers and architects remains elusive to ME!!! I guess not many of them have spent time "walking in our shop boots"?? A note: I'm beginning to suspect the alloy spec on these extrusions is susp...
by kmorin
Sun Mar 04, 2018 4:46 pm
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 21
Views: 1019

Re: Recent Chine Extrusion Experience

Just got an email from a friend who's been in this discussion of slotted chine boats and he's made a suggestion that may be worth "all the tea in China?" BoeShield T-90 (https://boeshield.com/) and ACF-50 (http://learchem.com/products/acf-50.html) could both be injected/wetted/flooded into these slo...
by kmorin
Sun Mar 04, 2018 2:07 am
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 21
Views: 1019

Re: Recent Chine Extrusion Experience

Yofish, I don't think that anyone would use 6063 underwater- even fresh water. The copper component of that alloy will interact with the parent metal and 6063 will 'eat itself' if underwater. I do think some of the chine extrusions may not be 6061-T6 but don't imagine anyone would use 6063 due to th...
by kmorin
Sun Mar 04, 2018 2:02 am
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 21
Views: 1019

Re: Recent Chine Extrusion Experience

Yofish, I didn't try to repair the chine to topsides seam- the project I had was add-on's almost exclusively. So none of this repair involved the chines' seams- or the sheer's very heavy extrusion that was welded on the top/gunwale/guard deck but not under the topsides or lower edge. If I were tryin...
by kmorin
Sat Mar 03, 2018 3:16 pm
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 21
Views: 1019

Re: Recent Chine Extrusion Experience

A note about the sketches I usually post (if I can get photobucket to cooperate!!! ?) I use colored blocks to suggest different pieces as 'all gray aluminum' images are confusing. I had to make the 'slot' for the topsides and bottom big enough to see the leak path for corrosion cells to form. The id...
by kmorin
Sat Mar 03, 2018 2:07 pm
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 21
Views: 1019

Re: Recent Chine Extrusion Experience

alumioforte, I'll provide an illustration of the condition or building technique and I'll show why I can't support the decision to build with this technique but the AAB.com welcomes all posters who're interested in good practices designing and building welded aluminum boats. So, not having anything ...
by kmorin
Fri Mar 02, 2018 7:52 pm
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 21
Views: 1019

Re: Recent Chine Extrusion Experience

Chaps, I had a short discussion about this topic with a friend who said he had one-on-one info about some of the alloys of the extrusions? His report was that the complexity of the shape of the extrusions- had caused some builders to ask for other than 6061-T6 extrusions? The reasoning he offered (w...
by kmorin
Fri Mar 02, 2018 11:07 am
Forum: Alloy Boat Forum
Topic: Electrical precautions when welding on hull
Replies: 6
Views: 464

Re: Electrical precautions when welding on hull

MacCTD, AC TIG uses high frequency and some times other wave forms to stabilize the arc while welding. If the work/ground/return lead is put on one end of the hull and the welding done on the other- I have "fried" on outboard control 'brain' module. It was some time ago- I'm told by reliable dealers...
by kmorin
Sun Feb 25, 2018 11:34 am
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 21
Views: 1019

Re: Recent Chine Extrusion Experience

OceanTrvlr sorry not to see the PM, just replied this am (my time) and will pay more attention to that feature of the site going forward. I'll try to get a sketch of what I'm discussing posted soon. One aspect of this topic of crevice corrosion that may be helpful is to use the Archive/Search functi...
by kmorin
Wed Feb 21, 2018 11:32 pm
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 21
Views: 1019

Recent Chine Extrusion Experience

We've talked about this in the past; but due to recent experience- doing a current repair in the shop on this skiff- I have some more remarks on the building method that is the subject of the post. I am unwilling to name the boat builder/manufacturing firm because I don't want the Forum to take a st...
by kmorin
Thu Feb 15, 2018 3:46 pm
Forum: Alloy Shop Talk
Topic: 5052 H32 ?
Replies: 6
Views: 708

Re: 5052 H32 ?

G&R, why not just drop some small pieces of the same plate/sheet into a plastic (non-reactive) bucket of the same water? do some different cleaning treatments, and drop some coupons into the tap water and see? I don't see the need to make pans/trays/tanks to do this test- just take some more of your...
by kmorin
Wed Feb 14, 2018 4:55 pm
Forum: Alloy Shop Talk
Topic: 5052 H32 ?
Replies: 6
Views: 708

Re: 5052 H32 ?

G&R, there wasn't any Simple Green soap involved in the clean up was there? That stuff has a clear warning in the MSDS about use on aluminum since I think the green is partly to do with copper ions included for some reason in the formula? I've seen some very exotic pitting from not washing Simple Gr...
by kmorin
Wed Feb 14, 2018 2:36 pm
Forum: Alloy Shop Talk
Topic: 5052 H32 ?
Replies: 6
Views: 708

Re: 5052 H32 ?

G&R, I'm not there and the photos are kind of generic in regard surface definition - I can see some coloration or discoloration- but not much definition of pitting or corrosion. When you strip mill scale the sander/buffer/disk/abrasive could have had lots of small trace contaminants that could lead ...
by kmorin
Tue Jan 30, 2018 3:00 am
Forum: Alloy Boat Forum
Topic: Posting photo's from Photobucket
Replies: 14
Views: 675

Re: Posting photo's from Photobucket

Well, talk about bait-and-switch! photobucket will let me keep my paid subscription where I pay them 40/yr or so to store my images and they link wherever I post the <img> type switch, as I've done here for a few years; but ONLY until the end of the year! AT that time, my storage is useless unless I...