Correct, basic law of science, Sacrificial anode.hornet wrote: ↑Wed Apr 08, 2020 10:49 amIt is still a contact point for the anode to do it's job, nothing the anode comes in contact with should be coated that restricts transfer, that includes bolts that hold them in place,if anything some engine oil so they thread in smoothly but will not interfere with metal to metal contact.Nude up wrote: ↑Wed Apr 08, 2020 10:25 amOnly the thread of the bolt is coated it’s like tooth paste only the thread of the anode is in contact with the pastehornet wrote: ↑Wed Apr 08, 2020 10:15 amCaution Nudie I wouldn't cote the anodes with anything...anodes are suppose to decay... if they don't decay your engine is corroding internally, I'm in the outboard trade.Nude up wrote: ↑Wed Apr 08, 2020 9:46 amIf you do use duralac wear gloves it is a chromate and is absorbed through your skin that said it is one of the best things to stop dissimilar metal corrosion widely used in the aviation industry. Ps I use it a lot on my boat an example the zinc trim tab anode and stainless bolt assemble with duralac remove in 5 years no issue.
The yellow is chromate the green does not contain chromate we use both at work but everyone uses gloves read the sds.
its only sacrificial if its in contact with the part its meant to save, otherwise its just another useless ornament.
also painting the anode is another strict NO NO!!!
For the anode to work, its needs to be in contact with the metal its protecting, as well as the saltwater its being used in.