5. Describe what is electrodeposition, describe the different experimental methods. Give examples. Advantages and disadvantages. It is the process of production a coating, usually metallic, on a surface by the action of an electric current._Experimental methods::-Electroplating: It is a plating process in which metal ions in a solution are moved by an electric field to coat an electrode. Metallic cations from a solution are reduced on a conductive object (to form a thin layer).-Electrophoretic deposition:Colloidal particles suspended in a liquid migrate under the influence of an electric field (electrophoresis) and are deposited onto an electrode._Advantages: uniform coating thicknen,easy control,high speed of coating and high pucity._Disadvantages:process is costly and time consuming,non-uniform plating. _Examples:anticorrosion,automobile parts,metal furniture

6. Describe what is physical vapor deposition, describe the different experimental methods. Give examples. Advantages and disadvantages.It is a vaporisation coating technique, involving transfer of material on an atomic level. It is similar to CVD, except that the raw materials/precursors starts out in solid form instead of starting out in gaseous state._Methods::-Sputtering: is a technique used to deposit thin films of a material onto a surface By first creating a gaseous plasma and then accelerating the ions from this plasma into some source material.-Evaporation: The vacuum allows vapor particles to travel directly to the target object (substrate), where they condense back to a solid state._Examples:Thin film solar panels._Advantages:Materials can be deposited with improved properties compared to the substrate material.The process is more environmentally friendly than processes such as electroplating._Disadvantages:High capital cost.The rate of coating deposition is usually quite slow.

7. Describe what is hot-dip galvanizing. Give examples. Advantages and disadvantages.It is the process of coating iron, steel or aluminium with a zinc layer. It is made by passing the workpiece through a malten bath of zinc at a high temperature (460ºC), to form a stable and protective surface coating._Methods:Non-continuous hot dip coating line,Continuous hot dip coating lines,Microstructure of the coating._Advantages: It is a highly versatile process,Long life,It protects the piece against corrosión._Disadvantages:The location of galvanizing plants is limited,In-situ steelwork (existing structures),cannot be hot-dip galvanizing._Examples:Pressed steel water tanks,Guardrails,Playground equipment.

8. What is SIMS? Advantages and limitations. Give examples concerning engineering materialsSIMS: Secondary Ion Mass Spectrometry :analyzes the composition of solid surfaces and thin films by sputtering the surface of the specimen with a focused primary ion beam and collecting and analyzing ejected secondary ions._Advantages:The analysis consumes very little sample,Samples with low concentration levels needed,No complex sample preparation needed._Limitations:Not all elements can be analysed,quantitatively,Expensive._Examples of application: Semiconductors, Superconductors, Glass, Stainless steel, Solid oxide fuel cells, Conservation science, Aerospace alloys, Biomaterials.