Search found 1339 matches

by kmorin
Sun Jun 17, 2018 5:26 pm
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 28
Views: 2020

Re: Recent Chine Extrusion Experience

MallardRain20, IMO the chines built with the slotted extrusions should be welded inside and outside AND pressure tested to 3-5psi. Many MIG welds have root porosity (gas pockets), just as many have cold lapped starts, and either condition can lead to a sealed void made at shop temperatures (60-80F)....
by kmorin
Mon May 28, 2018 10:39 pm
Forum: Alloy Shop Talk
Topic: 24' DYI alloy remodel
Replies: 504
Views: 27777

Re: 24' DYI alloy remodel

Tfitz, now all my remarks were in the best sense of appreciation for overbuilding but there may not be many/any images of this build - not sure yet? The reason is; the design is new, the bottom has not been done in welded metal anywhere- that I could find(?) and the interwebs are a great place to ha...
by kmorin
Mon May 28, 2018 9:32 am
Forum: Alloy Shop Talk
Topic: 24' DYI alloy remodel
Replies: 504
Views: 27777

Re: 24' DYI alloy remodel

tfitz, looks like your work is holding up, that has to be a long pull down to Valdez to get the Sound of Prince William? Glad to see the trip was rewarding, Neat seats, sure are beefy, you don't look near heavy displacement enough to warrant that much structure? Behind the dodger/cabin bulkhead to k...
by kmorin
Mon May 21, 2018 12:44 am
Forum: Alloy Boat Forum
Topic: Hull Pitting / Flowering
Replies: 9
Views: 502

Re: Hull Pitting / Flowering

AK7, just a few notes from the images. #1 the zincs (don't know alloy? might be a better alloy out there?) don't show excessive wear if they're original. #2 the trim tabs don't show too much galvanic reaction to the surrounding transom mount- the edges of these would be reactive even if the flats ar...
by kmorin
Fri May 18, 2018 6:39 pm
Forum: Alloy Boat Forum
Topic: Hull Pitting / Flowering
Replies: 9
Views: 502

Re: Hull Pitting / Flowering

AK7 the buff job seems to have left different colors of sheet? From the pictures, but not looking at the boat myself so I can't be sure- I'd say the buffing was not uniformly deep enough into the mill scale and that a good amount of it remained? Zep works best in higher concentrations, warmer metal ...
by kmorin
Thu May 03, 2018 2:19 am
Forum: Alloy Boat Forum
Topic: Recent Chine Extrusion Experience
Replies: 28
Views: 2020

Re: Recent Chine Extrusion Experience

delta, alumino, I'm sure there is a good reason (good to the person making it) for not welding outside these chine/socket extrusions? I don't buy into that particular design element but then I'm NOT manufacturing boats and price point- a couple hours here and there are not critical to my work. In a ...
by kmorin
Wed May 02, 2018 12:32 pm
Forum: Alloy Boat Forum
Topic: Miller 350P setting chart?
Replies: 1
Views: 217

Re: Miller 350P setting chart?

Alumioforte, agreed such a chart may help but the work of collecting and publishing is not likely returned to someone who's got this power supply and uses it full time? .... so I'm agreed it would be useful info, but not likely to appear anytime soon? I've just recently moved into a project where we...
by kmorin
Sun Apr 29, 2018 12:11 pm
Forum: Alloy Boat Forum
Topic: Through Hull Transducer Mounting For Aluminum Alloy Boats
Replies: 4
Views: 325

Re: Through Hull Transducer Mounting For Aluminum Alloy Boats

ehsvp, the only possible risk to the hull from a penetration is that the lower profile of the transducer is taken off- by impact or grounding- and leaves the hole open or partially open to flood the hull. Countering that- is the extremely low profile of most through hulls now. They are almost always...
by kmorin
Fri Apr 20, 2018 12:36 am
Forum: Your Alloy Boat
Topic: Almar 22 sounder repower
Replies: 16
Views: 1660

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: 521

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: 828

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: 623

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: 623

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: 623

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: 661

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: 661

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: 661

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: 28
Views: 2020

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: 28
Views: 2020

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: 28
Views: 2020

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: 28
Views: 2020

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: 28
Views: 2020

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: 28
Views: 2020

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: 28
Views: 2020

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: 28
Views: 2020

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 ...