TECNOSEAL ANSWERS - CORRODED BY DOUBT

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Tecnoseal Answers - Corroded by Doubt


The fields of galvanic corrosion and cathodic protection are fundamental for the good maintenance of a boat, but despite this there remain topics still largely unknown and where too often realities and urban legends mix with sometimes very expensive consequences.
Precisely for this reason, for the last Tecnoseal Answers before the summer break, we decided to do something different than previous releases. We have chosen two of the most common questions that are asked of us, both during the numerous boat shows in which we participate and during the Tecnoseal On Tour, and we have written the answers. Obviously these will not be completely exhaustive, but to deepen the topics covered you can refer to the specific Tecnoseal Answers.

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Question: I have a huge consumption of anodes although I have not been sailing for months. Why?
Answer: If you remember the TecnosealAnswers dedicated to the working of sacrificial anodes (you can find it here), you will also remember that the corrosion of a boat does not depend on its ignition. The variables involved are in fact others, such as the currents dispersed from the quay or the presence of boats moored next to it.
There is an entire category of anodes made to protect moored vessels: the suspended anodes for stationary boats. If one wants to be sure, he can carry out further checks by applying to the vessel a monitoring recorder for a given period (more than 24 hours), so as to understand when the peaks of corrosion occur.

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Question: I have noticed that the anodes are being consumed only on one side of the boat. Why?
Answer: We had already mentioned the topic in the Tecnoseal Answers dedicated to consumption and replacement of anodes (you can find it here). The concept is that when the anodes are placed in the right number and in the right place on the structure to be protected (whether it is hull, engine, transmission, etc), they bring the same to the right condition of protection in all its parts.
In theory, a zone of the protected structure becomes cathode (point of entry of the electric current) while another opposite becomes anode (point of exit). In the anodic zone, then we will have a greater consumption of the anodic material. In this reasoning, however, also affect the environmental conditions such as: position of the structure, salinity, proximity of other iron structures, etc. In extreme situations it is advisable to check the electrical connections inside the structure and their masses.

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Obviously the topic of galvanic corrosion is much wider and these are just two of the most frequently asked questions to our experts. To learn more about this topic, refer to the linked Tecnoseal Answers. If you have any other questions or concerns, you can go and see if these were treated in the list of articles in the Tecnoseal Academy category or you can asked them directly to us, coming to visit us during the various boat shows or contacting us by mail or live chat here on the website.
In the future we will treat other frequently asked questions choosing among the most interesting and useful ones. Maybe the next ones could be just the ones you want to do! Do not miss this opportunity to contact our experts!

SaveYourDreams

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Production of sacrificial anodes in the leisure boat market, fishing, naval, port, industrial, and civil sectors.
Consultancy, Design, and installation of cathodic protection systems.