20.500.12556/DKUM-76939 Analiza rezultatov za površinsko zaščito diplomsko delo univerzitetnega študijskega programa I. stopnje Analysis of results for surface protection V podjetju Unior d.d, ki je mednarodno priznan razvojni partner pri proizvodnji, preoblikovanju in obdelavi kovin ter velja za enega največjih svetovnih proizvajalcev ojnic in odkovkov za krmilne mehanizme osebnih vozil, se v procesu proizvodnje in razvoja ročnega orodja izvajajo številne analize kopeli, saj se lahko le na ta način zagotovi čim večja kakovost končnega izdelka. Primeri takšnih analiz kopeli so spremljanje koncentracije razmaščevalca, vsebnost celotne in proste kisline ter železa v fosfatni kopeli in koncentracije žveplove (VI) kisline v kopeli za jedkanje. Vse koncentracije smo vsakodnevno določali s postopkom titracije, dobljene porabe standardnih raztopin pa smo vnesli v Excel, kjer smo jih kasneje analizirali. Iz dobljenih meritev in analiz smo ugotovili, da bi za določene medsebojne odvisnosti lahko uporabili matematični model regresije. Slednji s pomočjo enačbe na podlagi porabljenega volumna KMnO4 za določanje vsebnosti železa v kopeli za jedkanje omogoča izračun vsebnosti železa v fosfatni kopeli. Prav tako je možen izračun količine porabljenega razmaščevalca na podlagi razlike med porabljenim volumnom NaOH za določanje celotne kisline in porabljenim volumnom NaOH za določanje proste kisline, ki je pomnožena z ustreznim faktorjem. Predstavljena je tudi skupina Unior d.o.o s kratkim pregledom razvoja skozi zgodovino ter program Ročno orodje, kamor spada tudi Laboratorij za galvano. Podana je tudi kratka razlaga in ops fosfatnih prevlek ter njihov glavni nameni uporabe. The company Unior d.d. is an internationally recognized development partner in the field of manufacturing, transformation (modification) and metal processing. The company is considered one of the world's largest manufacturers in connecting rods and forgings that are used for steering mechanism parts. A numerous chemical analyses in the process of manufacturing and development of hand tools are being carried out, since it is the only possible way to ensure the highest quality of the finished product. The examples of bath analyses are monitoring the degreaser concentration, the contents of entire and free acid and iron in the phosphate bath, and the concentrations of sulphuric (VI) acid in the etching bath. All the concentrations were checked daily by the titration procedure. The obtained results of standard solutions consumption were entered into Excel and analysed afterwards. Based on the obtained measurements and analyses, we have found out that we could use a mathematical regression model for specific interdependencies. This model is able to calculate the iron contents in the phosphate bath based on the consumed volume of KMnO4 used for determining the iron contents of the etching bath. Moreover, we could also calculate the volume of consumed degreaser according to the difference between the consumed volume of NaOH for determining total, and consumed volume of NaOH for determining free acid, which is multiplied by the corresponding factor. This diploma thesis also includes the presentation of the the group Unior d.o.o. with a brief overview of its development through the history, and the programme Hand tools that includes the Laboratory of galvanic works. A brief explanation and description of phosphate coatings and their main uses are written as well. fosfatiranje matematični model površinska zaščita mangan-fosfat phosphating mathematical model surface protection manganese-phosphate true true false [T. Skarlovnik] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2020-08-01 10:54:21 2020-09-24 08:19:06 2022-08-09 14:09:09 2020-10-02 03:23:54 2020 0 Maribor 0 Maribor VIII, 30 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.197.2(043.2) 30427139 URN:SI:UM:DK:RN50CGOK UN_Skarlovnik_Tjasa_2020.pdf UN_Skarlovnik_Tjasa_2020.pdf 1 3DFCBC95C7AA537A92306997B2019FF5 6cbdcba00ebf22387e235029139b7e9bb0f5533b1a61f5041c10fafa643bcd81 d1e7092a-7c11-11eb-bb7a-00155d0001ca 20.500.12556/dkum/0997aba0-820c-433b-b185-cff47f9b46ee https://dk.um.si/Dokument.php?lang=slv&id=145717 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0