Corrosion Lecture 8: Corrosion protection скачать в хорошем качестве

Corrosion Lecture 8: Corrosion protection

This is final lecture (8 of 8) from my undergraduate Corrosion lecture course. BOOKMARKS: 00:00 What is in this lecture about; high temperature corrosion will be skipped 05:32 Lecture notes chapter 5. Difference of (a) thermodynamic, (b) kinetic, and (c) barrier methods of corrosion protection 08:03 Sacrificial anodes 13:59 ICCP (impressed current cathodic protection) - using an electrical power source and a driven anode to cathodically protect a metal (e.g. steel) driven anode 22:33 Costs / disadvantages of ICCP 23:52 Stray current corrosion 27:04 Guadalajara sewer explosion (attributed to stray current corrosion) 30:39 Anodic protection (protecting some metals, like steel, by applying a high - or 'anodic' - potential!) 35:40 Corrosion inhibitors - a kinetic approach to corrosion protection. Cathode inhibitors for hydrogen (e.g. arsenic... toxicity of many inhibitors) 40:32 Cathode inhibitors for oxygen 41:28 Adsorption type inhibitors (e.g. amines) 42:07 Anode inhibitors (slowing down the active corrosion anode by providing an alternative anode reaction, e.g. the formation of a passive oxide) 44:43 Oxygen scavengers (a type of environment modification, but one which slows down corrosion kinetics by lowering the rate of oxygen supply by lowering its bulk concentration). 46:41 Coatings 51:16 Robust design and Environment modification 54:31 Thanks for listening! Slide on key outcomes of this course The subject is Corrosion Protection: engineering techniques to prevent corrosion based on the thermodynamic and kinetic models (lectures 2-5) and on knowledge of real-world corrosion phenomena (lectures 6-7). Thanks to Robin Ansell for production advice and help with recording this course. PDF lecture notes can be obtained here: https://github.com/quantitativeimagin... References and image credits for this lecture: http://www.corrosion-doctors.org/Stra... http://www.corrosionguru.com/guadalaj... http://corrosion.ksc.nasa.gov/