Fasteners - hdgasa

CommentsExecutive Director’sCommentAs we move into2011, it is normal toreflect on the state ofour industry in generaland more specificallyon the roll ofthe Association inthe corrosion controlindustry. Our primarygoal, as anAssociation, is toprovide an independent source of technicalknowhow when employing hot dip galvanizingand duplex coating systems to combat the ravagesof carbon steel corrosion.We support the wider industry by site visits,formal inspection and independent reports onproduct quality and the appropriate applicationof galvanizing a duplex coating systems. Wehave a detailed range of technical publications,including our Steel Protection Guide, PracticalGuidelines for the Inspector and our flagshipquarterly journal Hot Dip Galvanizing Today.We have a web site (www.hdgasa.org.za) with casestudies, codes of practice, information sheets,list of members and the latest updates on bothformal and social activities.Our educational activities include a newupdated three day inspector’s course thatencompasses practical activities at both agalvanizing plant as well at a paint applicatorsyard for exposure to duplex coatings systems.From 2011 we have introduced a oneday course entitled “Introduction to the hot dipgalvanizing process”. This course is aimed at thenew comers to the industry as well as plantoperators. We also view the one day courseas a “bridging course” to the more advancedthree day inspector’s course.A significant amount of data has been collectedand distributed relating to environmental,health and safety of both plant operatorsas well as the wider public.Environmental and waste management controls,within the hot dip galvanizing industry,have and will continue to receive a great dealof attention. A number of our members are tobe congratulated and encouraged to continueworking at implementing their action plansaimed at improving their environmental andwaste management controls.The Association needs to be seen as a technicalsupport service centre available to membersas well as the wider corrosion controlindustry.Bob WilmotNote from theEditorI am pleased to inform you that the 2011 version andupdate of SANS 121 (ISO 1461), has been released by theSouth African Bureau of Standards and while it is notnecessarily hugely different to the earlier standard thereare some noteworthy changes. In magazine No 40 wehighlighted these changes. (Should you want a copy of the magazine, contact us).Besides the significance of referring to SANS 121 when specifying hot dipgalvanizing, a further important reference specification that should be includedeach time is SANS 14713. In the next magazine we will discuss the usefulness ofthis specification.One of our main features for this issue includes hot dip galvanized fasteners. Weinvestigate the possibilities of hot dip galvanizing concrete self tapping screws whichwith the current coating often shows premature corrosion in coastal situations.We furthermore, publish a report on dissimilar metals with the failure of posidrivescrews used to fix a coated roof sheeted building in East London.Although early days yet, Draft SA Standard may be adopting SANS 14399 for highstrengthstructural bolt and nut assemblies. This is likely to lead to the redundancyof SANS 10094 which will be replaced by SANS 10684 “Fasteners – Hot dipgalvanized coatings”.An integral part of this feature is the publication of the annual hot dip galvanizedfastener availability matrix which includes a section on the versatile “Lindapter”structural fixings.Continuous hot dip galvanized sheeting is also featured where we have feedbackfrom SASFA (South African Light Frame Building Association) discussing theirsuccess since inception of the Association.Galfan coated wire – we look at the benefits of a locally produced Galfan wire withits associated corrosion benefits over pure zinc coated wire. Gabions, manufacturedfrom Galfan wire are more suitable to aggressive coastal environments.Corrosion protection by Zinc and Aluminium Thermal (Metal) spraying, wherecomponents are too large or cumbersome to hot dip galvanize. In the article“Medupi Chimneys – Thermal Zinc Metal Spray of plate girders” we discuss itssuccessful use.In addition to these, we feature the final article from Prof Stephen Yeomans in“Stephen’s Corner” on hot dip galvanized reinforcement for concrete. “It only workswhen you don’t need it!” Stephen’s article includes a number of internationalprojects.Other regular articles include Duplex Coatings where where Bob Wilmot respondsto Pieter Uys of Strutfast’s article “The Ultimate Challenge for the Paint Industry!”We hope to continue this discussion in subsequent issues.Education and Training includes our new 3-day Galvanizers Inspectors Course,which not only introduces greater practicality but more time in which to absorb thecourse information than the old 2-day course. A single day more practical coursefor those with limited formal education, has also been introduced.Other regulars include “On the couch” where we interview Anna Loubser, GeneralManager of Galvatech in Cape Town and in “Bob’s BANTER”, Bob discusses theconcept of “Prisoner’s dilemma”.Should a reader wish to express an opinion or provide us with an article, orcomment on our articles, kindly contact us –Enjoy the “magazinc”.Terry Smith2 Hot Dip Galvanizing Today Volume 8 Issue 1 2011