Essays about: "zinc alloy"

Showing result 1 - 5 of 8 essays containing the words zinc alloy.

  1. 1. EXAMINATION OF MICRO-SCALE SULFIDE DISTRIBUTION FOR THE GOLD MINERALIZATION IN THE LAPPBERGET DEPOSIT, GARPENBERG MINE, SWEDEN: TOWARDS A GEOMETALLURGICAL APPROACH

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Leo Barbosa; [2021]
    Keywords : Gold characterization; gold as by-product; Lappberget ore; Garpenberg Mine;

    Abstract : Ore characterization studies are of great importance to the mining industry, especially when dealing with precious metals by-products. It is a way towards increasing mining efficiency. READ MORE

  3. 2. Weight reduction of a connecting fitting used for frame assembly : A design optimization at IKEA Components AB

    University essay from Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Author : Emil Sjöqvist; David Johansson; [2019]
    Keywords : design; optimization; design improvement; weight reduction; design for environment; DFE; material study; 3D-scanning; reverse engineering; FEM; FEA; finite element method; strength analysis;

    Abstract : Continuous improvements are an integral part for the development of everyday life. These improvements do not only ascertain financial gain but also lessening the environmental impact. READ MORE

  4. 3. Material characterization of multi-layered Zn-alloy coatings on fasteners : Effects on corrosion resistance, electrical conductivity and friction

    University essay from KTH/Materialvetenskap

    Author : Ante Vallien; [2018]
    Keywords : ZnNi; zinc alloy; multi-layered coating; electrodeposited coating; fasteners; corrosion resistance;

    Abstract : Electroplated zinc-alloy coatings have been used on fasteners in the automotive industry for many years. The coating often consists of three layers: a zinc-alloy layer, a passivation layer and a sealer or top-coat. READ MORE

  5. 4. Microstructure-corrosion interrelations in new low-lead and lead-free brass alloys

    University essay from KTH/Materialvetenskap

    Author : Emil Stålnacke; [2017]
    Keywords : Brass; dezincification; annealing; detrimental phases; heat treatment; microstructure;

    Abstract : In new low-lead and lead-free brass alloys, it is not understood how the corrosion properties,such as dezincification, are related to material composition as well as annealing temperatureand duration. This study aims to fill this knowledge gap by mapping sixteen annealingconditions and three different brass alloy compositions to their respective microstructure anddezincification performance. READ MORE

  6. 5. Corrosion initiation induced by sodium sulfate and sodium chloride particles on Cu and the golden alloy Cu5Al5Zn at simulated atmospheric conditions

    University essay from KTH/Materialvetenskap

    Author : Weijie Zhao; [2017]
    Keywords : atmospheric corrosion; sodium sulfate; sodium chloride; Cu5Al5Zn; Cu metal; mixed salt pre-deposition; laboratory exposure; LOM; SEM EDS; ATR-FTIR; cathodic reduction;

    Abstract : Effects of sodium sulfate (Na2SO4) particle deposition on the atmospheric corrosion of copper (Cu) metal and a Cu-based alloy (Cu5Al5Zn) used in architectural applications were investigated at laboratory conditions compared with effects induced by sodium chloride (NaCl) and to some extent ammonium sulfate (NH4)2SO4 induced corrosion. Pre-deposited surfaces were exposed to repeated wet/dry conditions in a climatic chamber and the formation of corrosion products were assessed using light optical microscopy (LOM), scanning electron microscopy with elemental analysis (SEM/EDS), Fourier transform infrared techniques (FTIR microscopy) and cathodic reduction (CR). READ MORE