analyzing aluminum the ultimate technique for enhancing the corrosion resistance of automobile and aircraft parts creating non-porous templates for nanotechnological applications and making spreads resistant casings for electronic devices hello my name is Michael I have a material scientist and I have a few years of experience with analyzing and today I will teach you the basics about analyzing aluminum which is basically a three step process three treatments analyzing and sealing the pores in the following steps you will need to use protection like cloves and corals in order to keep yourself safe and also to prevent the contamination of the metal that will be anodized before starting with the pretreatment I'll attach the aluminum plate on a wire made out of the same material that way I'll prevent the contamination of the plate as I no longer need to touch it this wire will also serve as the electrical connection in the anodizing process now it's time to clean away the organic contamination soap and water can be used to remove most of the dirt after rinsing the plate with the ionized water I'll do the final cleaning with acetone before analyzing however we need to remove the natural oxide layer from the metal surface for that purpose we dip the plate into a sodium hydroxide solution for a short time the bubbling of hydrogen indicates that the oxide layer has been removed and that sodium hydroxide is reacting with aluminum after removing the natural oxide layer we rinse the plate with the ionized water and set up the anodizing system in this two electrode setup our aluminum plate is the anode and will be analyzed be sure to connect the aluminum object to the positive lead that is usually red the negative lead is connected to the cathode which can be made out of stainless steel make sure that these select roads are separated and parallel to each other in order to get the uniform oxide layer all over the anode ice plates I recommend using a stainless steel bath as cathode instead the bath should match the size and shape of the analyzable substrates in this case we are using a 10 percent sulfuric acid solution just be sure the whole substrate is immersed into the electrolyte before starting the process now it's time to select the anodizing parameters on the power supply I want to do the anodizing at the current density of 2 amperes per square decimeter since my plate has a total surface area of 3 square 30 meters I'll need to use a total current of 6 amperes the anodizing process begins when I turn on the power and in this case I'll anodized the plate exactly 30 minutes as a result another porous oxide layer is generated at the cost of aluminum the porosity and thickness of this oxide layer depends on the electrical parameters type of electrolyte its temperature and analyzing time for example hard scratch resistant oxide layers are done with Type three analyzing in sulfuric acid at near freezing temperatures and with lower current densities as you can see the anodized plate has a slightly different appearance this is due to the nano porous oxide layer that has formed on the surface and this is only visible with the help of a powerful scanning electron microscope after rinsing the anode is substrate with the deionized water it is time to see these non pores and there are several ways to do it the most common method is hydrothermal sealing which is emerging the anodized substrate into boiling water for an hour or so as a result some aluminum oxide is turned into aluminum hydroxide which takes up more space and are poor completely seeds the nano scale pores another popular method is dipping the freshly analyzed substrate into paint which is immediately sucked into the null holes this significantly increases the metals corrosion resistance and gives it an awesome appearance now I also mentioned that this anodic aluminum oxide can be used in all technological applications in our case we electrochemically deposited silver into these pores and then remove the aluminum oxide with sodium hydroxide as a result we got silver nano wires with well-defined length and biometric my name is Maya and I thank you for watching this video about analyzing the nominal checkout the description and be sure to subscribe by clicking on this red thing over here