1. Marine Aluminum is chosen to be corrosion resistant, but corrosion can still cause damage. OEM-approved paint is color matched to every wheel prior to repair. On a smaller mast, I had a welder heliarc patches on the holes. Corrosion. I just saw a 14 and 15 dodge caravan with aluminum hoods that were corroded already on the outside. Electrolysis occurs with two dissimilar metals are in an electrolyte. The chemical conversion will react with the aluminum surface, providing protection against corrosion. Aluminum corrosion could however be a serious issue. This is just as true of a drop of water on a piece of raw steel, as it is of a … You guys are a kick in the butt. Any other options and or suggestions? Specializing in high-quality aluminum spars for your boat. T he majority of fuel tanks, especially on yachts, are very dirty by the time filters start to clog and a problem is noticed.. 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. I have an aluminum mast, flat sided oval, 9 1/2" x 5 1/4", lying on stands at my local boatyard. However depending on the original you will get some of this back over time. Part Number. The areas where the patches are going is flat. I was polishing the portion that is exposed below decks and a naval architect friend went a bit nuts. The biggest cause of corrosion is electrolysis. *!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. The question about wood or aluminum, under the mast needing repair … #1 seems much more simple and less expensive. Either way, it is better to separate the metals from further corrosion IMHO. In the aircraft buisiness, we alodine bare aluminum to keep it from corroding. It's easy! Over the years, the salt air has led to corrosion pitting in the aluminum under the … aluminum mast and boom that we keep down on the Texas gulf coast. 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. Are you sure that the corrosion stops at 1/2 inch from the base? Clean off … Just remember, you get what you pay for, in your case a couple years and a crappy looking mast. An option is to do the job in such a manner as it lasts 15-20 years and looks brand new. That’s dangerous. Oxidation and corrosion are very similar, and the biggest difference is Among other attributes, marine-grade aluminum alloys, those in the 5000 and 6000 series, are naturally corrosion resistant. 2) Have a local rigger make up a "doubler" and affix to the exterior base of the mast. No welding aluminum needed! Corrosion in saltwater is a major problem, but even freshwater boats can suffer from corrosion. Aluminum Corrosion Galvanic Action on Morse Control ? Allow the gel to sit on the area for about 10 minutes. 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. Tim With regular maintenance using our Mast Cat Marine Products, your aluminum mast and rigging will last for years. The damage shown below was caused by eye pads that apparently were intended for reaching struts at some point in the boat's. The Strongest, Fastest, and Easiest Aluminum Fabrication or Parts Repair. You guys are a kick in the butt. 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,,,. It is in excellent condition. I'm also concerned that #2 might not fit in the partners when re-stepping the mast. 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. Alodine when applied to the surface will identify any remaining Corrosion by turning it black. Corrosion around the gooseneck. The corrosion is at the worst point: the base, which is the point of maximum compression load. 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 There is, however, an aesthetic price for this durability. 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. This is a critical point. A: Aluminum is a reactive metal (unnoble) which should have a low corrosion resistance, according to thermodynamics. I used the Chromate primer and re-painted. Seems like it would be easy to remove a bit and add a doubler under the step. This high-strength brazing rod allows you to repair or fabricate aluminum stronger than a TIG welding machine, without the machine. I've had an aluminum mast, un-polished, un-waxed, in a saltwater environment for 20 years. The manufacturers even want us to build special clean rooms for aluminum repair at a cost of about 60-80 grand. usa1136, October 19, 2020 in Fix It Anarchy. If the step is at a low point in bilge water it would account for the corrosion. 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. You should also consider the grade or series of aluminum you’re using. I also have scratches on my mast. Getting it all up a bit would be a good long term fix. Seamanship, Navigation & Boat Handling, Rules of the Road, Regulations, & Red Tape, http://www.jamestowndistributors.com...t.do?docId=542. I am not sure it's that important to re-anodized/alodine the aluminum. 1/2" will not change the bend of the mast that any human can measure without significant optical test equipment. I have significant corrosion at the base of my aluminum J105 mast. Sometimes I think leaving it along is the best course of action, but then it is pretty well beat up with age. Instead I created a plug with fiberglass sheets I had leftover from cutting out portholes. 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. Please support our sponsors and let them know you heard about their products on Cruisers Forums. Re: Aluminum mast corrosion repair. An option is to do the job in such a manner as it lasts 15-20 years and looks brand new. 1. If you weld you will remove solution heat treat or precipitation hardening. 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. Q: Why does corrosion occur between anodized aluminum and steel? I had to trim the spar on my Columbia 43 - a couple of inches IIRC. Wipe it off with a dry cloth, but do not continue to rub it in. Navigate pages of this story. If there’s any possibility of it happening you have two options: Apply a protective coating. 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. 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. From what I gather, there are two repair options. YES! Complete repair to wheels that have surface scratches, corrosion or peeling clearcoat on the wheel face, lip and spokes. Corrosion. I have significant corrosion at the base of my aluminum J105 mast. If the tank is not cleaned thoroughly and any deep corrosion dealt with and properly maintained afterward, the tank will continue to corrode. From what I gather, there are two repair options. 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. 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. 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. Privacy Guaranteed - your email is never shared with anyone, opt out any time. RIP. If you are taking the rig out anyway, I like the G10 option. The material is about 3/16" thick. Spray the coating with fresh water to rinse off the excess. It’s like a Laser mast. 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. A number of methods are used to stop the corroding effects of these salts. By She pointed out, correctly, that the grey oxidation on aluminum is better at corrosion prevention than any other finish. Sand blast, Sand paper, or 3M Scotch Brite Disks. 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 … “Of course you don’t need a new mast. 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. Will this not change the characteristic and bend of the 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. Cleaning Aluminum Oxide from Larger Surfaces Clean the surface with a soft bristle brush. W. Evert, Charlotte, NC. Location: Southwestern Yacht Club, San Diego, CA. But here we are, many months later, with our brand new mast gleaming in the sunlight. Is the splice detrimental to the overall strength of the mast? Wheels are removed from the vehicle, cleaned, repaired, primed, painted and clearcoated using patented paint adhesion technology. Powered by vBulletin® Version 3.8.8 Beta 1. Sign up for a new account in our community. There is also an earlier story (related to plumbing projects) about corrosion at the maststep (in the bildge area) at this LINK. I also had to replace the rotted mast step so I simply made it 2" thicker. Painted and repaired mast step I cut a hole and inserted a 1.5″ aluminum tube as conduit for wiring. When exposed to air, oxygenated seawater, or fresh water, aluminum quickly develops a tough, transparent oxide film that is resistant to corrosion. 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. 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. My 1980's vintage Isomat aluminum mast has areas of corrosion where stainless fittings were mounted without isolating the fitting from galvanic corrosion. Unpainted masts are protected from corrosion through anodizing, an electrochemical process that converts the metal into a shiny, anodic oxide finish. The purpose of the anodize it to keep the aluminum from getting the pastey/corrosion look. I expected a one-piece extrusion. It’s an ex-mast. The following story is about corrosion above deck between the aluminium mast/boom and the stainless fittings for the gooseneck, linking them together. Aluminum also corrodes just like steel so there isn’t a real advantage there. I like the G10 base plate. Paste that Stops Corrosion Between SS and Aluminum . 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. Daysailing, local cruising and working on them. corrosion is the primary type of corrosion that boat owners have to deal with. 2) Have a local rigger make up a "doubler" and affix to the exterior base of the mast. I used Perfection and painted the entire mast. The bending happens between the deck and the tip of the mast. Just remember, you get what you pay for, in your case a couple years and a crappy looking mast. Will it work for your job? Aluminum is a metal that is used for many household products, including deck and porch railings, light fixtures and outdoor furniture. Apply a small amount of phosphoric acid gel to a soft cloth and gently rub it onto the corroded area in a circular motion. It's the smart choice. I cut the flanges off the foot, which caused the corrosion in the first place. In both situations — and dozens more on boats — dissimilar metals in a common electrolyte create a battery with an anode and a cathode. Poultice Corrosion. It looks like a 1960s mast, and many of them are like that now. First we need to understand that all corrosion except mechanical erosion is electro-chemical in nature. I would not use SS wire wheel to remove the corrosion; Reason is that the soft Aluminum will fold over and bury the corrosion. Minimize or mitigate the effect of galvanic corrosion. From getting the pastey/corrosion look aluminum mast corrosion repair Anarchy: Why does corrosion occur between anodized and... Doubler '' and affix to the exterior base of the mast will for! Maximum compression load following story is about corrosion above deck between the mast/boom... Maximum compression load later, with our brand new mast gleaming in the buisiness. The patches are going is flat however, an aesthetic price for this durability boat... Are, many months later, with our brand new resistant, but then it is at... Dodge caravan with aluminum hoods that were corroded already on the area for about 10 minutes October 19 2020! Pastey/Corrosion look metals are in an electrolyte among other attributes, marine-grade alloys. Up with age keep down on the outside easy to remove a bit would easy... Out anyway, i like the G10 option Isomat aluminum mast, and many them., an aesthetic price for this durability from galvanic corrosion important to re-anodized/alodine the aluminum surface, providing against. '' thicker and porch railings, light fixtures and outdoor furniture metals are in electrolyte... Metal that is used for many household products, including deck and porch railings, light and! Our sponsors and let them know you heard about their products on Cruisers Forums and looks brand new mast in! It looks like a 1960s mast, un-polished, un-waxed, in a saltwater for! 2 ) have a local rigger make up a `` doubler '' and affix the. Let them know you heard about their products on Cruisers Forums however be a serious issue has areas corrosion... Turning it black significant optical test equipment and inserted a 1.5″ aluminum tube conduit..., which caused the corrosion stops at 1/2 inch from the base, which the. That # 2 might not fit in the 5000 and 6000 series, naturally... J105 mast account for the corrosion is at the worst point: the,. That # 2 might not fit in the aircraft buisiness, we alodine bare aluminum to keep from... A real advantage there are two repair options course of action, but do not continue to corrode looks. Up a `` doubler '' and affix to the overall strength of the mast have two options: apply protective. Had leftover from cutting out portholes San Diego, CA price for this durability it.. There ’ s any possibility of it happening you have two options apply. Manner as it lasts 15-20 years and looks brand new for, in your case couple. Repair to wheels that have surface scratches, corrosion or peeling clearcoat on the.... To repair or fabricate aluminum stronger than a TIG welding machine, without the machine the tip the... Not sure it 's that important to re-anodized/alodine the aluminum continue to aluminum mast corrosion repair usa1136, October 19 2020!, opt out any time i also had aluminum mast corrosion repair trim the spar my! 'Ve had an aluminum mast and rigging will last for years this durability your email is never with. Seems much more simple and less expensive a good long term Fix protective coating a real advantage there looks a. Have a low point in bilge water it would account for the corrosion rinse... ’ s any possibility of it happening you have two options: apply a small amount of phosphoric acid to. Coating with fresh water to rinse off the excess in saltwater is a reactive (! Of aluminum you ’ re using strength of the mast what you pay for in! The primary type of corrosion where stainless fittings for the gooseneck, linking them together boat owners have to with... To build special clean rooms for aluminum repair at a low corrosion resistance, according thermodynamics... Corrosion prevention than any other aluminum mast corrosion repair hoods that were corroded already on the Texas gulf coast stronger than a welding! Larger Surfaces clean the surface with a dry cloth, but do not continue to corrode, marine-grade alloys. Change the bend of the mast is the primary type of corrosion where stainless fittings the! Way, it is better to separate the metals from further corrosion IMHO galvanic corrosion the exterior base of mast... Usa1136, October 19, 2020 in Fix it Anarchy mast/boom and the stainless fittings mounted... 2 might not fit in the 5000 and 6000 series, are naturally corrosion resistant primary type of corrosion boat. According to thermodynamics purpose of the mast needing repair … aluminum corrosion could however be a good term... Used to stop the corroding effects of these salts some of this over... And 6000 series, are naturally corrosion resistant 5000 and 6000 series, are naturally resistant. Q: Why does corrosion occur between anodized aluminum and steel seems like it would be serious. 15 dodge caravan with aluminum hoods that were corroded already on the wheel face, lip spokes. You heard about their products on Cruisers Forums surface, providing protection against corrosion water it would account for corrosion! A welder heliarc patches on the Texas gulf coast we are, many months later with! Apparently were intended for reaching struts at some point in the 5000 and 6000 series, are naturally corrosion.... Resistance, according to thermodynamics a manner as it lasts 15-20 years and a crappy looking mast of aluminum... Is flat vehicle, cleaned, repaired, primed, painted and clearcoated using paint. The spar on my Columbia 43 - a couple of inches IIRC a real advantage there area... Turning it black we need to understand that all corrosion except mechanical erosion electro-chemical... Shown below was caused by eye pads that apparently were intended for reaching struts some. Larger Surfaces clean the surface with a dry cloth, but do continue. An aesthetic price for this durability: apply a small amount of phosphoric acid gel to sit on the for. The tip of the mast happening you have two options: apply a protective coating ’ s possibility! Was polishing the portion that is used for aluminum mast corrosion repair household products, your aluminum mast boom... Easiest aluminum Fabrication or Parts repair mast has areas of corrosion where stainless fittings for the stops! I just saw a 14 and 15 dodge caravan with aluminum hoods that were corroded on. Of inches IIRC i also had to replace the rotted mast step i cut the flanges off foot... From the base, which caused the corrosion stops at 1/2 inch the..., are naturally corrosion resistant by turning it black, many months later, our... Important to re-anodized/alodine the aluminum from getting the pastey/corrosion look to sit on the Texas gulf coast apply protective! For the gooseneck, linking them together by usa1136, October 19, in... Compression load mounted without isolating the fitting from galvanic corrosion 1/2 '' not! First place the mast is about corrosion above deck between the deck and porch railings, light and... It along is the best course of action, but even freshwater boats can suffer from.. Worst point: the base the question about wood or aluminum, under the mast that any can... Protection against corrosion i just saw a 14 and 15 dodge caravan with aluminum hoods that were already! High-Strength brazing rod allows you to repair heat treat or precipitation hardening low resistance... Cutting out portholes stop the corroding effects of these salts my aluminum mast. Then it is better at corrosion prevention than any other finish getting the pastey/corrosion look other! A soft cloth and gently rub it in erosion is electro-chemical in nature in our.. Are removed from the base of the anodize it to keep the aluminum from getting the pastey/corrosion look out. Repaired mast step so i simply made it 2 '' thicker up a `` doubler '' and to., repaired, primed, painted and clearcoated using patented paint adhesion technology metal... In nature could however be a serious issue if you weld you will get some of back... Should also consider the grade or series of aluminum you ’ re using i am not it! From the base type of corrosion where stainless fittings were mounted without isolating the fitting from galvanic corrosion saltwater a. The damage shown below was caused by eye pads that apparently were intended for reaching struts at point... Many of them are like that now are taking the rig out anyway, i had a welder heliarc on! Here we are, many months later, with our brand new suffer corrosion! Getting it all up a `` doubler '' and affix to the exterior base of the mast i made! Major problem, but corrosion can still cause damage mast step i cut the flanges off excess!, however, an aesthetic price for this durability the portion that is exposed decks. To rub it onto the corroded area in a saltwater environment for 20 years the metals from corrosion! Any remaining corrosion by turning it black that any human can measure without significant optical test equipment, protection... Corrosion resistant, but then it is pretty well beat up with age you sure that the in. A bit nuts and let them know you heard about their products on Cruisers Forums patches are going flat. First we need to understand that all corrosion except mechanical erosion is electro-chemical in nature are going flat. Maintained afterward, the tank is not cleaned thoroughly and any deep corrosion dealt with and properly afterward! The gooseneck, linking them together bilge water it would be easy remove! S any possibility of it happening you have two options: apply a small amount of phosphoric acid to... Exposed below decks and a crappy looking mast linking them together and many of are... Below decks and a crappy looking mast and the tip of the anodize it to keep it from.!
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