|
|
Fluoride conversion coatings on magnesium materials
Staněk, Jan ; Wasserbauer, Jaromír (referee) ; Březina, Matěj (advisor)
This bachelor thesis deals with the topic of corrosion protection of magnesium materials by conversion coatings. The aim is to characterize and compare properties of fluoride conversion coatings formed on wrought magnesium sample and magnesium sample prepared by powder metallurgy. Basic knowledge of pure magnesium, magnesium alloys, powder metallurgy, corrosion, and protection against it are described in the theoretical part. Recent results of corrosion protection by fluoride conversion coatings on magnesium materials are summarised in the recherché part. The experimental part is focused on preparation of fluoride conversion coatings on each type of sample by immersion in Na[BF4] molten salt and by dipping in hydrofluoric acid. Surface morphology and composition of coatings were characterized by EDS analysis and corrosion protection was evaluated by potentiodynamic measurements.
|
|
|
Preparation and characterization of fluoride conversion coating on magnesium material
Šmíd, Jakub ; Doskočil, Leoš (referee) ; Březina, Matěj (advisor)
This thesis deals with the preparation of fluoride conversion coating on magnesium material. The effect of the coating time on the formation of the coating was investigated and the corrosion resistance of the resulting coatings was measured. The theoretical part is focused on magnesium and its alloys, powder metallurgy, corrosion and protection against it. Furthermore, conversion coatings, especially fluoride coatings, and their applications are discussed. The review section focuses on the current state of research in the field of fluoride conversion coatings. The experimental part describes the procedures of sample preparation and coating formation. The effect of time on the formation of the coating is investigated by monitoring the microstructure, mainly by elemental analysis of the surface of the samples in the section. Furthermore, the corrosion resistance of the samples is measured by potentiodynamic polarization in NaCl solution.
|
|
|
Fluoride conversion coatings on magnesium materials
Staněk, Jan ; Wasserbauer, Jaromír (referee) ; Březina, Matěj (advisor)
This bachelor thesis deals with the topic of corrosion protection of magnesium materials by conversion coatings. The aim is to characterize and compare properties of fluoride conversion coatings formed on wrought magnesium sample and magnesium sample prepared by powder metallurgy. Basic knowledge of pure magnesium, magnesium alloys, powder metallurgy, corrosion, and protection against it are described in the theoretical part. Recent results of corrosion protection by fluoride conversion coatings on magnesium materials are summarised in the recherché part. The experimental part is focused on preparation of fluoride conversion coatings on each type of sample by immersion in Na[BF4] molten salt and by dipping in hydrofluoric acid. Surface morphology and composition of coatings were characterized by EDS analysis and corrosion protection was evaluated by potentiodynamic measurements.
|
guest ::
