Corrosion properties of aluminum alloy layers obtained by wire and arc additive manufacturing (WAAM)

Tema ovog završnog rada je korozijska postojanost slojeva aluminijske legure dobivene postupkom aditivne proizvodnje električnim lukom i žicom (WAAM). Rad je podijeljen u dva dijela, prvi teorijski i drugi eksperimentalni. U teorijskom dijelu opisani su postupci aditivne proizvodnje, te uspoređeni međusobno. Opisane su prednosti i nedostaci postupka aditivne proizvodnje električnim lukom i žicom u odnosu na tradicionalne postupke proizvodnje. Navedeni su i opisani najčešći oblici korozije koji se pojavljuju kod aluminija i njegovih legura. Nadalje, opisana je podjela aluminijskih legura prema načinu proizvodnje i objašnjeno njihovo označavanje. Navedena je podjela aluminijskih legura prema glavnom legirnom elementu, te opisan utjecaj tog legirnog elementa na mehanička svojstva i korozijsku otpornost aluminijske legure. Na kraju teorijskog dijela opisan je utjecaj postupka aditivne proizvodnje električnim lukom i žicom na korozijsku otpornost aluminijske legure serije 5XXX. U eksperimentalnom dijelu, opisana je aditivna proizvodnja uzorka (WAAM), izrada manjih uzoraka na kojima će se provesti ispitivanja, njihova naknadna obrada i priprema. Ukupno su ispitana četiri uzorka, tri odvojena strojnom obradom s uzorka proizvedenog aditivno (WAAM), i jedan uzorak od osnovnog materijala, aluminijske legure 5083. Ispitan je kemijski sastav izrađenih uzoraka, te su provedena elektrokemijska ispitivanja. Rezultati su analizirani i uspoređeni.The topic of this thesis is the corrosion resistance of aluminum alloy layers obtained by the process of wire arc additive manufacturing (WAAM). The paper is divided into two parts, the first is theoretical and the second is experimental. The theoretical part describes the processes of additive manufacturing and compares them. The advantages and disadvantages of the wire arc additive manufacturing relation to traditional manufacturing processes are described. The most common forms of corrosion that occur in aluminum and its alloys are listed and described. Furthermore, the division of aluminum alloys according to the method of manufacturing is described and their numeration is explained. The division of aluminum alloys according to their main alloying element is given, and the influence of the main alloying element on the mechanical properties and corrosion resistance of aluminum alloy is described. At the end of the theoretical part, the influence of the wire arc additive manufacturing on the corrosion resistance of aluminum alloy series 5XXX is described. In the experimental part, wire arc additive manufacturing (WAAM) of the sample, production of smaller samples on which tests will be performed, their post-processing and preparation are described. A total of four samples were tested, three separated by machining from a sample manufactured additively (WAAM), and one sample of base material, aluminum alloy 5083. The chemical composition of the samples was tested, and electrochemical tests were performed. The results were analyzed and compared