A Self-Learning Manual - Institution of Engineers Mauritius

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A Self-Learning Manual Mastering Different Fields of Civil Engineering Works (VC-Q&A Method) Vincent T. H. CHU Institute (2002). 17. What is the mechanism of protection by hot dip galvanizing? (S10) Hot dip galvanizing protects steel/iron from corrosion by: (i) It forms a metallic zinc and zinc-iron alloy coating on top of steel surface. This zinc coating reacts with moisture in atmosphere to from zinc salts which act as an insulating layer for steel/iron. (ii) Zinc is higher than steel/iron in the galvanic series and when these dissimilar metals with different electrical potential are in contact, the zinc anode corrodes and offers sacrificial protection to steel/iron and hence steel/iron is protected from corrosion. 400
A Self-Learning Manual Mastering Different Fields of Civil Engineering Works (VC-Q&A Method) Vincent T. H. CHU 13. Module Twelve: General Issue Objectives Element Description Objective No. General Issue General Issue Working stress approach and limit state approach 401 GI1 Different components of paint GI2 Insurance GI3 Design life GI4 Sureties and security GI5 Safety GI6
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A Self-Learning Manual - Institution of Engineers Mauritius

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