reyzor Posted April 13, 2012 Share Posted April 13, 2012 hey all, a mate of mine has recently got his hands on a brand new bar crusher.... being a tinny i want to know what steps to take to stop corrosion when we bolt tie down point to it. we are looking at making up somewhere to store the engle so it doesnt get thrown around. with dissimilar metals etc we would hate to see any corrosion start on his new pride and joy.. any ideas, products, or methods we can use? cheers... Link to comment Share on other sites More sharing options...
Geoff Posted April 13, 2012 Share Posted April 13, 2012 Firstly , only use 316 stainless bolt or screws. These are best purchased from a marine dealer as hardwase stores sell S/S but in a lower grade. Corrosion occurs between the fastner & the aluminium when exposed to salt water therefore , use a good quality sealant under the bracket or fitting like Sikaflex also available from marine dealers. Geoff Link to comment Share on other sites More sharing options...
reyzor Posted April 13, 2012 Author Share Posted April 13, 2012 i figured as much with the 316ss but wouldnt you still get corrosion between the 2 metals? Link to comment Share on other sites More sharing options...
dhype Posted April 13, 2012 Share Posted April 13, 2012 hey all, a mate of mine has recently got his hands on a brand new bar crusher.... being a tinny i want to know what steps to take to stop corrosion when we bolt tie down point to it. we are looking at making up somewhere to store the engle so it doesnt get thrown around. with dissimilar metals etc we would hate to see any corrosion start on his new pride and joy.. any ideas, products, or methods we can use? cheers... Hi Just get a tube of Duralac from the boating store and use it between all your screws, bolts etc etc... this should help somewhat If installing surface mount rod holders etc , use a thin sheet of silicon between it and the boat... i use to use cheap ipad silicon covers and cut that up to size... you can find these for a few dollars on FleeBay. Cheers Trung Link to comment Share on other sites More sharing options...
reyzor Posted April 13, 2012 Author Share Posted April 13, 2012 Hi Just get a tube of Duralac from the boating store and use it between all your screws, bolts etc etc... this should help somewhat If installing surface mount rod holders etc , use a thin sheet of silicon between it and the boat... i use to use cheap ipad silicon covers and cut that up to size... you can find these for a few dollars on FleeBay. Cheers Trung yeah thats a good idea..... i guess im more worried about where the bolt penetrates through the tinny...... i gues there isnt much of a way you can stop that..... Link to comment Share on other sites More sharing options...
nigelr Posted April 13, 2012 Share Posted April 13, 2012 duralac between dissimilar metals and disconnect your battery/ies! PITA maybe, but personally worth the peace of mind. Link to comment Share on other sites More sharing options...
brickman Posted April 13, 2012 Share Posted April 13, 2012 most important to prime and paint the holes after drilling and then all off the above cheers gary Link to comment Share on other sites More sharing options...
Juggs Posted April 14, 2012 Share Posted April 14, 2012 also keep it dry as possible, on grass with a tarp over it doesn't help i kept mine in the garage but then realised the clothes drier was pumping moist air into the room and causing issues Link to comment Share on other sites More sharing options...
OzMacca Posted April 14, 2012 Share Posted April 14, 2012 I like that Trung, fleebay. I had to laugh. I use Duralac & I have battery isolators on both my batteries, that I turn off when my tinny is not in use. Cheers Tommy Link to comment Share on other sites More sharing options...
chrisg Posted April 14, 2012 Share Posted April 14, 2012 As Gary says - prime and paint raw all raw metal first, then use the additional product. Its the raw metal that does it - that's why people have corrosion probs on newish boats because slack dealers just drill and bolt. Doesn't take long. Link to comment Share on other sites More sharing options...
BWV Posted April 15, 2012 Share Posted April 15, 2012 Duralac is a carcinogenic, Tefgel is another product which works better than Duralac without the side effects. You must drill the holes bigger than needed and prime and paint as mentioned and have a rubber boot between the different grades of metals. You should try and have rubber inbetween the bolts and the holes that you have drilled too. Link to comment Share on other sites More sharing options...
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