RPI Masters Project Final Report Siobhan Fleming 8/6/12 Evaluation of Coating Methods for Corrosion Protection of Magnesium Castings.

Slides:



Advertisements
Similar presentations
3.1 STEEL Iron-carbon compounds Microstructure of steels
Advertisements

Materials Technology Degradation of Materials. Overview - Degradation of Materials OPTION The student will learn about… The effect of environmental conditions.
Aluminium A large Aluminium billet from which wrought products will be produced.
Production Technology (IND 006) Preparatory Year, Faculty of Engineering, Fayoum University Dr. Ahmed Salah Abou Taleb Lecturer, Industrial Engineering.
6-1 Chapter 6 Overview b Four major alloy groups most common: Aluminum, magnesium, zinc and ZA Aluminum, magnesium, zinc and ZA b These alloys have a range.
Aerospace Use Of Hexavalent Chromium And Soluble Nickel In Relation To REACh 7th October 2009 From a combined Goodrich and Rolls-Royce review of the implications.
INTRODUCTION TO METALS
Review on Carbotanium Aditya Chandurkar.
Stainless Steels Stainless steels are iron base alloys that contain a minimum of approximately 12% Cr, the amount needed to prevent the formation of rust.
Conceptual Designs. Most Commonly used Metals Plain carbon steels –Available in all structural forms, thin sheets, coated or uncoated, cold formed, hot.
Materials.
MIND OVER Metals General Chemical Corp. - Established in 1980 in Detroit, MI - Only worldwide supplier offering a complete line of ccompatible fluxes,
Metals Part 2 Manufacturing Processes, MET 1311 Dr Simin Nasseri
RPI Masters Project Preliminary Final Report Siobhan Fleming 7/25/12 Evaluation of Coating Methods for Corrosion Protection of Magnesium Castings.
RPI Masters Project Progress Report 1 Siobhan Fleming 6/11/12 Evaluation of Coating Methods for Corrosion Protection of Magnesium Castings.
Corrosion & Associated Degradation
LECTURER6 Factors Affecting Mechanical Properties
Presented by: Chandra bhan prajapati 2008AMD2934.
By Stephen Huse. Outline Abrasion and adhesion description Variables that change the wear rate Variables changed by coatings Surface coating processes.
Heat Treatment of Metals
TYPES OF METALS.
Bachelor of Technology Mechanical
Annealing Processes All the structural changes obtained by hardening and tempering may be eliminated by annealing. to relieve stresses to increase softness,
1 Trade Skills HVACR116 Sheet Metal. 2 The most common types of Sheet Metal material used in HVAC are: –Aluminum –Stainless Steel The most common types.
Agricultural Mechanics CD Identifying Metals and Their Physical Properties Lesson A5–1.
GENERAL MOTORS Day Three Introduction to Thermal Spray.
Nonferrous Metals and Alloys
CANKAYA UNIVERSITY OFFICE OF BASIC AND ELECTIVE COURSES -ENGLISH UNIT-
Chapter 9 Characteristics of Metallic Materials. Objectives Four major classifications – ferrous,non ferrous, high temperature super alloy, and refractories.
Chapter 30 Processes Used to Condition Plastic Materials.
Definition Chassis and Body. Chassis : The chassis forms the main structure of the modern automobile. A large number of designs in pressed-steel frame.
Selection Criteria Properties Availability Cost Manufacturability
MIND OVER Metals General Chemical Corporation General Chemical Corp. - Established in 1980 in Detroit, MI - Only worldwide supplier offering a complete.
Nonferrous Alloys. l Aluminum Alloys l Magnesium and Beryllium Alloys l Copper Alloys l Nickel and Cobalt Alloys l Titanium Alloys l Refractory and Precious.
Pure Tungsten As a high performance materials, Pure Tungsten has high melting temperature, high density, low vapor pressure, low thermal expansion combined.
- heating on at required temperature - dwell at temperature - cooling
 Earth’s materials are being used up at a quicker rate than they can be replenished  We must find substitutes for common materials  Substitutes should.
ENVIRONMENT ASSISTED CRACKING  When a metal is subjected to a tensile stress and a corrosive medium, it may experience Environment Assisted Cracking.
-Phosphate post-treatment of spontaneous spray deposited cerium-based conversion coatings (CeCCs) on Al 2024-T3 increases their corrosion performance -The.
 Elements of physical metallurgy of non-ferrous metals- classification, physical, chemical and mechanical properties of some important aluminium, titanium,
Chad Allen, Devon Rood, Kurt Core.  Connects the aileron to plane.
Cast Irons Engr. Waqas Javaid WEC.
Mechanical properties Tensile test Hardness Toughness Fracture toughness Fatigue test Creep resistance Tensile test Hardness Toughness Fracture toughness.
Forms of Corrosion: Uniform Pitting Crevice Corrosion or Concentration Cell Galvanic or Two-Metal Stress Corrosion Cracking Intergranular Dealloying Selective.
The mystery of life is not a problem to be solved, but a reality to be experienced - Meditations from Buddislamic Text The mystery of life is not a problem.
MAGNESIUM THIXOMOLDING
Mr. Pullom SWHS Identifying Metals and Their Properties.
SURFACE TREATMENT AN OVERVIEW
Mr. A Roberts GCSE Resistant Materials Materials and their Uses - Metal.
Metallurgy and Metal’s Physical Properties
Introduction to nonferrous metal and alloys
Section 20-1 Metals The periodic table divides the elements into three classes: metals, nonmetals, and metalloids. Metals are found to the left of the.
COATING AND DEPOSITION PROCESSES
DR KAFEEL AHMED Cast iron Properties 1.Strength 2.Hardness 3.Brittleness 4.Stiffness Depends upon 1.Alloying elements 2.Annealing.
PRESENTED BY : AJIT BEHERA National institute of technology, Rourkela.
BY ADITYA RAMAKRISHNAN
Materials. Metal Metals are chemical elements that are good conductors of electricity and heat. Metals are extracted from mineral ores. Metals with high.
Corrosion process and control (TKK-2289)
steel sheets for BRAUN TUBES Frame Inner Shield Band.
The Machinability of Aluminum 1 Group 32. content Introduction Machining of aluminum The Machining Process 1-Forms of Aluminum Chips 2- Surface of Machined.
Nonferrous Metals & Alloys. Nonferrous Metals Ferrous Alloys – alloys contain iron Nonferrous Metals – metals do not contain iron such as Copper (Cu),
Properties OR Working Characteristics
@ 2016 Global Market Insight, Inc. USA. All Rights Reservedwww.gminsights.com Metal Matrix Composites industry analysis research and trends report for.
By: Engr. Hassaan Bin Younis
Materials Science Introduction to Materials Properties of Materials
Zinc Powder for Coating - Protective Primer on Metal Surfaces Zinc Powder For Coating.
STEEL AS A CONSTRUCTIONAL MATERIAL
PURE POLYSILOXANE Anti-Corrosion Si-COAT® COATINGS
MME 293 Lec 22 PROTECTIVE COATINGS.
Selection Criteria Properties Availability Cost
Presentation transcript:

RPI Masters Project Final Report Siobhan Fleming 8/6/12 Evaluation of Coating Methods for Corrosion Protection of Magnesium Castings

Agenda Project Review Research Review Magnesium Magnesium Alloys Magnesium Coatings Recommendations for alloys and coatings

Project Review Extensive review of technical journals completed Magnesium Alloys Coating for corrosion protection Review highlighted new technology in coatings that may be very successful in corrosion protection with more research. Good alloys for certain application were identified throughout the document and segregated in a final table.

Research Review Technical journals reviewed through electronic village Offered excellent details for specific uses Provided insight into new technologies Specific texts reviewed for background on magnesium, magnesium alloys and coatings for corrosion protection

Magnesium Lightest of light metal alloys Low Density Good Heat Dissipation Good Damping Good Electro-magnetic shield Useful in applications were weight is a critical design element Susceptible to corrosion

Magnesium Alloys Alloys designed to improve corrosion resistance Specific elements offer different benefits when combined into alloy form Benefits are laid out in table format by element in the paper Each alloy has its own benefits Selected alloys are documented in paper for benefits

Magnesium Coatings Numerous different coatings provide coating protection Example of coating protection for aerospace applications is provided in paper Cold spray appears to be the future of coatings More research is required on specific alloys in order to eliminate the concern of galvanic corrosion.

Recommendations for Alloys AlloyApplicationNotes AZ91 Cast Helicopter Transmission Housings Less costly, good tensile strength, very susceptible to creep above 120ºC. Good corrosion resistance. AM60/AM50/AM20 Automotive (wheels, seat frames, steering wheels) Greater ductility and fracture toughness. AS41 Automotive (crank case, transmission housing) Easier than AS21 to cast with better fluidity QE22Aerospace (landing wheels, gearbox housings, helicopter rotor fittings) Superior tensile properties, Expensive due to silver

Coatings Advantages and Disadvantages Coating TypeAdvantagesDisadvantages Chemical ConversionMost effective and mature process Cr 6+ in chromate bath is a highly toxic carcinogen facing restrictions with use. Phosphate TreatmentsChromate Free Coarse grains can cause cracks; heavy metal ions in solution can cause environmental pollution. AnodizingCan improve paint adhesion to metals, Coatings are brittle and prone to cracking or shedding after collision. Plating (electro and electroless) Can improve corrosion resistance depending on what material is plated on surface. Plating films have a weak adhesion to magnesium alloys. Issues with galvanic corrosion depending on type of metal used. Sol-Gel Can achieve better layering than electroless plating. Some testing has proved very successful using TiO 2 Potential issues with galvanic corrosion depending on material used. TAGNITE Chromate free, better abrasion resistance, wet paint adhesion, impact resistance and fatigue properties. Has not been proven as a complete protection. Useful more in touch up conditions where fine tolerances are required. Paint Provides a final protective coating when used in combination of other coating techniques. Only provides additional protection when built up correctly with other coatings. Does not provide protection when chipped or cracked. Cold SprayAdheres well with fewer issues than plasma spray. Testing has proved improved corrosion resistance when high purity aluminum is used as sprayed material. Still a new technology, not widely tested. Concerns with galvanic corrosion depending on coating material used.