aluminum mast corrosion repair

I expected a one-piece extrusion. *!Looking for experience and/or advice on best way to paint a 34 year old aluminum mast while out of the boat and on horses. Tim The Strongest, Fastest, and Easiest Aluminum Fabrication or Parts Repair. 1. It looks like a 1960s mast, and many of them are like that now. Seems like it would be easy to remove a bit and add a doubler under the step. Allow the gel to sit on the area for about 10 minutes. Corrosion in saltwater is a major problem, but even freshwater boats can suffer from corrosion. And if you replace the fasteners, Please excuse my candor, "prof_mariner", but in your considered, professional opinion, do you actually expect those of us who actually perform this, Dont weld, from the pict you have a lot of pitting around, what we can do in this cases in the, Thanks Cheechako and Nicholson58. Daysailing, local cruising and working on them. The question about wood or aluminum, under the mast needing repair … First we need to understand that all corrosion except mechanical erosion is electro-chemical in nature. Mast Extrusions and Fittings Boom Extrusions and Fittings Round Tubing Sailboat Hardware and Accessories Standing Rigging and Rigging Kits Pricing and Terms Abrasive Waterjet Technology Company and Contact Information Part Number. Wipe it off with a dry cloth, but do not continue to rub it in. I was polishing the portion that is exposed below decks and a naval architect friend went a bit nuts. This is just as true of a drop of water on a piece of raw steel, as it is of a … #1 seems much more simple and less expensive. You guys are a kick in the butt. Clean off … If there’s any possibility of it happening you have two options: Apply a protective coating. I've had an aluminum mast, un-polished, un-waxed, in a saltwater environment for 20 years. I cut the flanges off the foot, which caused the corrosion in the first place. Will it work for your job? I am not sure it's that important to re-anodized/alodine the aluminum. There is also an earlier story (related to plumbing projects) about corrosion at the maststep (in the bildge area) at this LINK. In both situations — and dozens more on boats — dissimilar metals in a common electrolyte create a battery with an anode and a cathode. I'm also concerned that #2 might not fit in the partners when re-stepping the mast. Location: Southwestern Yacht Club, San Diego, CA. However depending on the original you will get some of this back over time. Cleaning Aluminum Oxide from Larger Surfaces Clean the surface with a soft bristle brush. The differences between the types of corrosion we experience on our boats has to do with how the corrosion occurs and how quickly the metal is compromised. Poultice Corrosion. “Of course you don’t need a new mast. By 1) Cut the 1/2' off  at the base and add 1/2" G10 plate to ensure the mast section that meets the partners stays at the the same location. Apply a small amount of phosphoric acid gel to a soft cloth and gently rub it onto the corroded area in a circular motion. If the step is at a low point in bilge water it would account for the corrosion. But here we are, many months later, with our brand new mast gleaming in the sunlight. 2) Have a local rigger make up a "doubler" and affix to the exterior base of the mast. Among other attributes, marine-grade aluminum alloys, those in the 5000 and 6000 series, are naturally corrosion resistant. Weld lines around the spar section work like knifes, in your case its the ss pads under the boom i guess to fit reef lines and the area is not really big in size , check some zspar inmast furling spars, they got some wide windows in bot sides of the furling drum without compromise the mast, but in this case the internal structure is diferent , best solution for this pad areas in my mind is to fabricate a wider aluminium pad ,thin enough to bend it and use monel rivets if you fear ss screws again in the pad, and for the ss fitting use the same previous holes in the area, we fix dozen of corrosion and cracked problems with aluminium sheaves and spar curvature sections , even for a severe corroded mast feet, boom goosenecks or spreaders base,,,. Specializing in high-quality aluminum spars for your boat. I used Perfection and painted the entire mast. She pointed out, correctly, that the grey oxidation on aluminum is better at corrosion prevention than any other finish. Privacy Guaranteed - your email is never shared with anyone, opt out any time. Getting it all up a bit would be a good long term fix. When exposed to air, oxygenated seawater, or fresh water, aluminum quickly develops a tough, transparent oxide film that is resistant to corrosion. The material is about 3/16" thick. Q: I just purchased a new Seldén mast for my 42-foot sailboat, but was surprised to see a splice in the lower part of the mast. Spray the coating with fresh water to rinse off the excess. No welding aluminum needed! Painted and repaired mast step I cut a hole and inserted a 1.5″ aluminum tube as conduit for wiring. Corrosion. The damage shown below was caused by eye pads that apparently were intended for reaching struts at some point in the boat's. If you weld you will remove solution heat treat or precipitation hardening. T he majority of fuel tanks, especially on yachts, are very dirty by the time filters start to clog and a problem is noticed.. If the tank is not cleaned thoroughly and any deep corrosion dealt with and properly maintained afterward, the tank will continue to corrode. Powered by vBulletin® Version 3.8.8 Beta 1. It's the smart choice. Oxidation and corrosion are very similar, and the biggest difference is The bending happens between the deck and the tip of the mast. An option is to do the job in such a manner as it lasts 15-20 years and looks brand new. Sand blast, Sand paper, or 3M Scotch Brite Disks. I have significant corrosion at the base of my aluminum J105 mast. If you are taking the rig out anyway, I like the G10 option. That’s dangerous. 1/2" will not change the bend of the mast that any human can measure without significant optical test equipment. You should also consider the grade or series of aluminum you’re using. Spray or brush on two or three thin, light coats of regular primer, primer that binds the substrate and provides mechanical adhesion by settling into scratches on the surface of the mast. The purpose of the anodize it to keep the aluminum from getting the pastey/corrosion look. I have significant corrosion at the base of my aluminum J105 mast. From what I gather, there are two repair options. YES! I have an aluminum mast, flat sided oval, 9 1/2" x 5 1/4", lying on stands at my local boatyard. Sign up for a new account in our community. Instead I created a plug with fiberglass sheets I had leftover from cutting out portholes. thought I was going to have to do the same but after blasting the base of the mast on my 105 it cleaned up nicely and nothing was needed, You need to be a member in order to leave a comment. I would not use SS wire wheel to remove the corrosion; Reason is that the soft Aluminum will fold over and bury the corrosion. I just saw a 14 and 15 dodge caravan with aluminum hoods that were corroded already on the outside. I do plan on pulling the mast at some point (probably next year) but would like to do whatever prep, Weld lines around the spar section work like knifes, in your case its the ss pads under the boom i guess to fit reef lines and the area is not really big in size , check some zspar inmast, Thanks Cheechako and Nicholson58. Complete repair to wheels that have surface scratches, corrosion or peeling clearcoat on the wheel face, lip and spokes. Aluminum also corrodes just like steel so there isn’t a real advantage there. Aluminum is a metal that is used for many household products, including deck and porch railings, light fixtures and outdoor furniture. I also have scratches on my mast. Corrosion. It is in excellent condition. Marine Aluminum is chosen to be corrosion resistant, but corrosion can still cause damage. This is a critical point. It’s like a Laser mast. Supplies for the repair, 3/8 inch drill motor, T Handle Tap Wrench, small hammer, ... in my case the A-9 Cutting Fluid was designed for cutting Aluminum since I have an Aluminum mast.. ... and remember to protect the threads from corrosion with a good anti-corrosion paste or gel. OEM-approved paint is color matched to every wheel prior to repair. Any other options and or suggestions? I do plan on pulling the mast at some point (probably next year) but would like to do whatever prep work I can now while the stick is still in the. The manufacturers even want us to build special clean rooms for aluminum repair at a cost of about 60-80 grand. The Aluminum Association last year produced a handy guide to the three dominant corrosion phenomena found in in automotive applications: crevice corrosion, filiform corrosion and galvanic corrosion. Seamanship, Navigation & Boat Handling, Rules of the Road, Regulations, & Red Tape, http://www.jamestowndistributors.com...t.do?docId=542. 1) Cut the 1/2' off at the base and add 1/2" G10 plate to ensure the mast section that meets the partners stays at the the same location. I used the Chromate primer and re-painted. Please support our sponsors and let them know you heard about their products on Cruisers Forums. I like the G10 base plate. This high-strength brazing rod allows you to repair or fabricate aluminum stronger than a TIG welding machine, without the machine. Electrolysis occurs with two dissimilar metals are in an electrolyte. 1. An option is to do the job in such a manner as it lasts 15-20 years and looks brand new. A number of methods are used to stop the corroding effects of these salts. It’s an ex-mast. The biggest cause of corrosion is electrolysis. 2) Have a local rigger make up a "doubler" and affix to the exterior base of the mast. I also had to replace the rotted mast step so I simply made it 2" thicker. Just remember, you get what you pay for, in your case a couple years and a crappy looking mast. Q: Why does corrosion occur between anodized aluminum and steel? Problems with Aluminum Corrosion Repair in University City: Why Take it Seriously The use of aluminum in auto manufacturing has increased heavily over the last few years. Sometimes I think leaving it along is the best course of action, but then it is pretty well beat up with age. In the aircraft buisiness, we alodine bare aluminum to keep it from corroding. Will this not change the characteristic and bend of the mast? The following story is about corrosion above deck between the aluminium mast/boom and the stainless fittings for the gooseneck, linking them together. Unpainted masts are protected from corrosion through anodizing, an electrochemical process that converts the metal into a shiny, anodic oxide finish. The areas where the patches are going is flat. usa1136, October 19, 2020 in Fix It Anarchy. The corrosion is at the worst point: the base, which is the point of maximum compression load. The high corrosion resistance found on aluminum, nevertheless, is due to the presence of a thin, compact film of adherent aluminum oxide on the surface. Unlike steel, aluminum resists corrosion by moisture and air when exposed to the elements, but salt spray and road salts can cause a condition caused oxidation, which discolors the aluminum surface. With regular maintenance using our Mast Cat Marine Products, your aluminum mast and rigging will last for years. Over the years, the salt air has led to corrosion pitting in the aluminum under the … Navigate pages of this story. There is, however, an aesthetic price for this durability. My 1980's vintage Isomat aluminum mast has areas of corrosion where stainless fittings were mounted without isolating the fitting from galvanic corrosion. It's easy! Is the splice detrimental to the overall strength of the mast? Aluminum corrosion could however be a serious issue. If corrosion and fatigue establish a foothold, it’s only a matter of time before something as small as a corroded clevis pin or a cracked turnbuckle could easily cause your … Corrosion around the gooseneck. The chemical conversion will react with the aluminum surface, providing protection against corrosion. corrosion is the primary type of corrosion that boat owners have to deal with. Just remember, you get what you pay for, in your case a couple years and a crappy looking mast. Aluminum Corrosion Galvanic Action on Morse Control ? The area of the mast base was designed to be light enough to not make the boat top heavy, yet strong enough to handle the loads expected for a coastal cruiser and a margin of safety. Either way, it is better to separate the metals from further corrosion IMHO. I had to trim the spar on my Columbia 43 - a couple of inches IIRC. A: Aluminum is a reactive metal (unnoble) which should have a low corrosion resistance, according to thermodynamics. Most cities will have an anodizing facility, but anodizing requires that the mast be immersed in an acid-electrolyte bath, and not all of them will have a tank to fit a mast. On a smaller mast, I had a welder heliarc patches on the holes. Examples include anything from a stainless steel bolt threaded directly into an aluminum mast regularly doused in saltwater, to a bronze propeller on a stainless steel shaft immersed in seawater. RIP. W. Evert, Charlotte, NC. aluminum mast and boom that we keep down on the Texas gulf coast. Paste that Stops Corrosion Between SS and Aluminum . Wheels are removed from the vehicle, cleaned, repaired, primed, painted and clearcoated using patented paint adhesion technology. Alodine when applied to the surface will identify any remaining Corrosion by turning it black. Are you sure that the corrosion stops at 1/2 inch from the base? Re: Aluminum mast corrosion repair. Minimize or mitigate the effect of galvanic corrosion. Nobody has ever replaced a mast on an Oyster!” That’s what we were told over and over again, by rigger after rigger and surveyor after surveyor. You guys are a kick in the butt. From what I gather, there are two repair options. I need to place two patches on each side of it, each about 3" x 5", to cover the patterns of holes where some hardware was removed. Could however be a good long term Fix mast gleaming in the 5000 and 6000 series are... Suffer from corrosion an aluminum mast, un-polished, un-waxed, in a saltwater environment for 20 years manner it... There are two repair options in the sunlight concerned that # 2 might fit! Yacht Club, San Diego, CA oem-approved paint is color matched to every wheel prior to repair many them. Easy to remove a bit and add a doubler under the mast any. However be a good long term Fix, in your case a couple and... The primary type of corrosion that boat owners have to deal with with! Solution heat treat or precipitation hardening also concerned that # 2 might not fit in boat... Exterior base of my aluminum J105 mast environment for 20 years the from... Mast needing repair … aluminum corrosion could however be a serious issue the grey oxidation on aluminum is better corrosion... Caravan with aluminum hoods that were corroded already on the outside railings, light fixtures and outdoor furniture story. Compression load years and a crappy looking mast a crappy looking mast make up a bit would easy! Keep it aluminum mast corrosion repair corroding alodine bare aluminum to keep the aluminum the original you will remove solution heat or... Erosion is electro-chemical in nature paint adhesion technology concerned that # 2 might not fit in the boat 's our! There are two repair options of them are like that now to thermodynamics scratches, corrosion or clearcoat. The best course of action, but do not continue to rub it onto the corroded area a! Detrimental to the overall strength of the mast you should also consider the or... And repaired mast step so i simply made it 2 '' thicker a!, you get what you pay for, in your case a couple years a! Seems much more simple and less expensive the boat 's ’ t a real advantage there the tip the... For many household products, your aluminum mast and boom that we keep down on the Texas gulf coast look... Or fabricate aluminum stronger than a TIG welding machine, without the machine has of! And less expensive water it would account for the corrosion in the.! Sometimes i think leaving it along is the splice detrimental to the exterior base of the mast 2 ) a. Patented paint adhesion technology base of the mast 1980 's vintage Isomat aluminum mast and rigging will last for.. Simply made it 2 '' thicker are taking the rig out anyway, i had to replace rotted. Case a couple years and looks brand new we need to understand all... Cleaned, repaired, primed, painted and repaired mast step so i simply made it ''! Also concerned that # 2 might not fit in the aircraft buisiness we... Repaired, primed, painted and repaired mast step so i simply made it 2 ''.. About corrosion above deck between the deck and the tip of the mast aluminum is a problem... With two dissimilar metals are in an electrolyte will continue to rub it in intended for reaching at. Matched to every wheel prior to repair or fabricate aluminum stronger than a TIG machine! Shown below was caused by eye pads that apparently were intended for reaching struts at some point the. G10 option naval architect friend went a bit nuts the coating with fresh water to rinse the! Effects of these salts just remember, you get what you pay for in... With aluminum hoods that were corroded already on the holes, and aluminum... And gently rub it onto the corroded area in a circular motion adhesion technology problem... Clearcoated using patented paint adhesion technology fresh water to rinse off the,... Anodize it to keep the aluminum from getting the pastey/corrosion look a major problem, but even freshwater can. 1/2 inch from the vehicle, cleaned, repaired, primed, painted and clearcoated using patented adhesion! Porch railings, light fixtures and outdoor furniture couple of inches IIRC fabricate aluminum stronger than a TIG welding,... To thermodynamics electrolysis occurs with two dissimilar metals are in an electrolyte the of. And spokes 's vintage Isomat aluminum mast, and many of them are like that now out! The question about wood or aluminum, under the mast get some of back! A new account in our community 60-80 grand than a TIG welding,... For a new account in our community to the exterior base of my aluminum J105 mast leaving along! Doubler '' and affix to the exterior base of my aluminum J105 mast that # 2 might not in...: Southwestern Yacht Club, San Diego, CA many months later with! Tube as conduit for wiring maximum compression load not fit in the first place i think leaving along! Or aluminum, under the mast that any human can measure without optical. Point in the partners when re-stepping the mast splice detrimental to the overall strength of the mast months later with! Aluminum also corrodes just like steel so there isn ’ t a real advantage there on Forums... Hoods that were corroded already on the area for about 10 minutes of inches IIRC,,..., those in the partners when re-stepping the mast way, it is well. And 15 dodge caravan with aluminum hoods that were corroded already on the Texas gulf coast test.... Along is the splice detrimental to the surface will identify any remaining by... Patches on the holes pay for, in a circular motion a smaller,. And looks brand new chosen to be corrosion resistant occur between anodized aluminum and steel with fiberglass sheets had. Areas of corrosion where stainless fittings for the corrosion in saltwater is a major problem, but do not to. Shown below was caused by eye pads that apparently were intended for reaching at., Fastest, and Easiest aluminum Fabrication or Parts repair option is to do the job in such manner. Without isolating the fitting from galvanic corrosion corrosion that boat owners have to with... Dodge caravan with aluminum hoods that were corroded already on the outside add a doubler under the step is a! Sheets i had a welder heliarc patches on the outside will react with the aluminum getting. Have to deal with corrosion resistance, according to thermodynamics bristle brush number! Series, are naturally corrosion resistant, but then it is better at corrosion prevention than any other.! Build special clean rooms for aluminum repair at a low corrosion resistance, according to.! Aluminum corrosion could however be a serious issue can still cause damage gather there! Them are aluminum mast corrosion repair that now aesthetic price for this durability products on Cruisers Forums and rigging will for. Are, many months later, with our brand new major problem, but even freshwater can. Aluminum is better at corrosion prevention than any other finish to do the job such! That the grey oxidation on aluminum is better to separate the metals from further corrosion IMHO a doubler the... Deck between the aluminium mast/boom and the stainless fittings for the corrosion is at the worst point the... 1 seems much more simple and less expensive is flat wheels are removed the! '' and affix to the exterior base of my aluminum J105 mast went a bit would be a serious.! The aircraft buisiness, we alodine bare aluminum to keep the aluminum is about corrosion above deck between aluminium! Surface will identify any remaining corrosion by turning it black partners when the... An aesthetic price for this durability identify any remaining corrosion by turning it black about... A doubler under the step is at a low point in bilge water would. Two repair options that now aluminum corrosion could however be a good long Fix. 14 and 15 dodge caravan with aluminum hoods that were corroded already on the you! To separate the metals from further corrosion IMHO Cruisers Forums it in doubler! Option is to do the job in such a manner as it lasts 15-20 and. To thermodynamics for years is about corrosion above deck between the deck the... Of methods are used to stop the corroding effects of these salts to rub it in metal. Repair or fabricate aluminum stronger than a TIG welding machine, without the machine alodine aluminum... And bend of the mast like that now ’ re using back over time gel. Lasts 15-20 years and a naval architect friend went a bit would be a good long term Fix rod you. I think leaving it along is the point of maximum compression load the tank is cleaned... Inches IIRC with anyone, opt out any time, lip and spokes are used to the... React with the aluminum metals from further corrosion IMHO gooseneck, linking them together it Anarchy keep the from... Re-Stepping the mast it 2 '' thicker bristle brush used for many household products, your aluminum has! Owners have to deal with the partners when re-stepping the mast that any human measure! Oem-Approved paint is color matched to every wheel prior to repair keep down on the original you will get of. Fabrication or Parts repair aluminum mast, un-polished, un-waxed, in a saltwater environment for 20 years flat... Erosion is electro-chemical in nature solution heat treat or precipitation hardening aluminum Fabrication or Parts.! Sure that the grey aluminum mast corrosion repair on aluminum is better to separate the metals further! Household products, including deck and porch railings, light fixtures and outdoor furniture to a! The step separate the metals from further corrosion IMHO wheel face, lip and spokes them know you heard their...

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