ThermalWinter
Comments
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That's alright, thank you for your help Cassox. I'll go ahead and put the message I PM'd you on here. I'll do some research on whether the galvanic corrosion will effect the NdFeB and put my findings on this thread. I'll continue speaking to as many manufacturers as possible and question their coating methods and materials…
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Riurao mind sharing how you believe that implant would take place in the first place let alone how it will work when the subject matures/is born? What is the method of communication between the brain and a computer? Exactly what would you implant in the DNA? CRISPR technology is actually far from complete and almost any…
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According to multiple sources a .9% solution of saline is only pH 5.5-6 in salt water and 7 in distilled water. This test is not nearly as harsh as the diluted bleach test, if it passed that I still don't see a reason it couldn't reasonably pass this.
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Could you give more information on what you need? I may be able to help you depending on what you're looking for
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Why would testing for the presence of the undercoat not show if the top layer was entirely intact to prevent the degradation of the undercoat? If your concern is it will be difficult to discern which magnets failed that can be easily solved by using small amount of the solution and testing each magnet individually. I…
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Galvanic corrosion effects the anode/less noble metal which in this case is the titanium/TiN instead of the gold. I sent a message to Cassox and am hoping we can come to a conclusion on how to make the magnets and what manufacturers/coaters I can use. I am still trying to get magnets coated in Au+Ti as it's the most ideal…
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For the Ti or the TiN?
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The manufacturer who I am using just contacted me and told me they can no longer do titanium coatings because of the difficulty and cost of the procedure. Instead I am now getting TiN coatings. Cassox can you give any more information on the corrosion's source? The popular vote was 3x1mm.
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That sounds promising except what's the layer and cause of the chemical reaction the corrosion would originate from? Could you explain further?
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This company does coatings for many different kinds of objects, two categories being aerospace and medical implant plating. According to finishing, "titanium cannot be a 'plator' from a conventional aqueous plating bath," which is alright because according to the manufacturers "Most coatings are done in a bath. But…
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I'm not singularly relying on the titanium's oxide layer for the chemical resistance. Titanium, as a metal, is very chemically resistant on it's own. Can you backup your claim that even unflawed titanium, with an oxide layer from the oxygen in the diluted bleach, would break down? If I remember correctly the pH that gold…
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That's a good point, i'll look into that... thanks for pointing it out. The company is based here in the U.S. and I'm currently waiting for a response from one of their engineers
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@Birdhandz"deposited nickel can be chemically separated from the copper substrate by immersion in an aqueous solution containing CrO3 (250 g/l) and sulfuric acid (15 cc/l) at room temperature for around 4 days"-https://www.finishing.com/270/27.shtml This follows the same principle as diluting the bleach to get an alkaline…
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Titanium is a better biocompatible material than TiN because of a film it creates when it comes into contact with oxygen, such as in our blood, that is incredibly chemical resistant. If you want to know more or want to invest you can head over to my thread.
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I don't really have anything to review, all my research is in this thread. I would talk to you next Monday but I'm not sure when i'll reach $360. What do you recommend I reconsider to get better results? Also, what are the slack boards? I am going straight Ti. The company does reduce the price if I raise the amount but it…
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@Cassox I would consider doing that but I am paying $360 for 25 magnets coated in Ni+Cu+Ti. The cost to perform all those coatings would be incredibly expensive. Would you mind sharing why you think the magnets would fail if they are coated in this combination?
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I'll consider Electroplating of Platinum. Cassox it's seems like you misunderstood me, I didn't say you 4 didn't correctly test, I said most users don't have the capabilities to test. I never said that you had them performed incorrectly either. I said a majority of magnets seem to have that issue, and from what I have been…
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One method you can use to determine the integrity of a magnets coating is the method I am intending on using in my batch. Depending on the material you use for your coatings you can use acidic or alkaline solutions such as diluted bleach. The solutions pH has to be basic enough not to degrade the outer biocompatible layer…
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The new manufacturer we are using (which is why the price has increased) can do a large majority of coatings with the restriction of cost feasibility. The current set of 25 N52s coated in Ni+Cu+Ti has been confirmed to be able to bond well and will cost $360 for the magnets alone. I will personally cover the testing costs.…
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@birdhandz I am using a method of testing the magnets that I haven't heard of used. I can test the integrity of the magnet in solutions harsher than the human body and accurately test for compromises in the coating. The price and material fluctuated because, surprise, it's very difficult to find manufacturers that are…
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@Zerbula What exactly do you want to know? Also, would you mind posting a source for the process of testing NdFeB? I searched it but couldn't find it. The new manufacturer does them professionally in house so each coat is very expensive. We may even have to raise the price even higher in order to finance the Ni-Cu-Ti which…
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@birdhands you are actually exactly right. I was considering the zinc layer (mgZn @Zerbula) as a way of testing, added protection, and a relatively biosafe material. The old manufacturer didn't like adding parylene over gold or neodymium and zinc was the next best option. Admittedly there isn't much to the zinc layer, it…
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@Aeris I have already tried both coatings because they are the best coatings for a biocompatible implant. It is very difficult to find suppliers of coated magnets/companies willing to coat Ti and TiN so I've been forced to consider other coatings. I was just contacted and I should be receiving a $120 pledge, putting us at…
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Ivo you can also look into investing in the development of magnets on the site. I'm personally organizing an effort to work on biocompatible magnets. Go here for more information (self advertising alert) The majority of important information can be found down the…
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Animania you should probably make your own thread. I'll message you a link to my thread that can give you some pointers.
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Thank you for your pledge. I am coating the neodymium in zinc and parylene. I have confirmed that this combination is possible, and I am waiting for their jeweler to confirm if the zinc will properly connect with a gold layer. This combination of coatings allows for a long lasting protective coating. I am in the process of…
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@DACPA Thank you for pledging $20 towards development. I am currently receiving pledges and you can contact me/pay through paypal using [email protected]. I have spent a long time attempting to find feasible methods/suppliers capable of safely coating N52's with Ti, TiN, etc and have come to the conclusion these…
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TeknikIr parylene and other common coating such as nickel are used because neodymium is a very fragile rare earth metal and can easily turn into powder under small impacts. Neodymium has a very low tensile strength. I am contacting other companies and have confirmed that coating neodymium in copper, gold, then zinc is…
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Thomas you are making surprising progress. Most users who research this topic give up after seeing how difficult the math is, how little electricity can make it to the receiver coil since it drops of rapidly, and the amount of heat generated. May I ask how you are counteracting the amount of heat that is generated? The…