PPT-Reference Electrodes Materials Engineering

Dr Lubna Ghalib Hydrogen Electrode The hydrogen electrode is used as a reference for electrode potential measurements Theoretically it is the most important electrode for use in aqueous solutions The reversible hydrogen electrode in a solution of hydrogen ions at unit activity exhibits a potential which is assumed to be zero at all temperatures The electrode consists of a platinum wire immersed in a solution containing hydrogen ions and saturated with hydrogen gas Platinum is immersed completely in aqueous arsenic free hydrochloric acid and hydrogen gas free from oxygen and carbon monoxide is bubble and the reversible potential is achieved Unfortunate this electrode has some drawbacks First the reversibility of hydrogen electrode cannot be maintained in oxidizing media Second if a current is withdrawn from the electrode the electrode acts an anode because of the ionization of gas molecules Figure 14. Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture . 11 . – . Iron and steel. wikipedia. Iron and steel. EMMAT101A Engineering Materials and Processes. Reference Text. Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture . 17 . – . Aluminium . and its alloys. Aluminium . and its alloys. EMMAT101A Engineering Materials and Processes. Reference Text. Keri Brophy-Martinez. Designs in Instrumentation. Electrochemistry. Electrochemistry. Basic principle. Electrodes are used to selectively measure particular ions. Instruments utilizing electrodes measure the potential difference (charge) that builds up at an interface when two different . Materials for Electrochemical Energy Conversion. Part . 4. Materials for . Li ion . rechargeable batteries. Truls Norby. Overview of this part of the course. What is electrochemistry?. Types of electrochemical energy conversion devices. Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture . 20 . – . Properties of plastics. Properties of plastics. EMMAT101A Engineering Materials and Processes. Reference Text. Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture . 14 . – . The surface hardening of steels. Flame Hardening. The surface hardening of steels. EMMAT101A Engineering Materials and Processes. Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture . 12 . – . The heat-treatment of plain-carbon steels. High Carbon Steel is used in springs. http. ://cnhuaxing.en.made-in-china.com. Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture . 24 . – . Fibre-reinforced composite materials. Fibre-reinforced composite materials. EMMAT101A Engineering Materials and Processes. Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture . 23 . – . Composite Materials. Composite Materials. EMMAT101A Engineering Materials and Processes. Reference Text. Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture . 7 . – . Mechanical shaping of metals. Mechanical Deformation of Metals. EMMAT101A Engineering Materials and Processes. Lecture . 11 . – . Iron and steel. wikipedia. Iron and steel. Engineering Materials and Processes. Reference Text. Section. Higgins RA & Bolton, 2010. . Materials for Engineers and Technicians, . Lecture . 12 . – . The heat-treatment of plain-carbon steels. High Carbon Steel is used in springs. http://cnhuaxing.en.made-in-china.com. The heat-treatment of plain-carbon steels. Engineering Materials and Processes. Announcements I. Homework Set 1.3 Solutions Posted (no problems will be collected). Exam 1. Mar. . . 7. th. Will review topics on Thursday. Will cover all electronics topics and electrochemistry (Ch. 13 most or all of Ch. 14). ENMAT101A Engineering Materials and Processes. Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture 3 – Mechanical Testing. Mechanical Testing. EMMAT101A Engineering Materials and Processes.