HDGASA V7E1.pdf

CommentsExecutive Director’sCommentThe year 2009 has beenassigned to history andwe are already 1/6th ofthe way through 2010.The year ahead is fullof promise with a focuson a number of newprojects andprogrammes as well asthe continuation ofothers.Education and training of people that aredirectly or indirectly involved in hot dipgalvanizing of carbon steel for corrosioncontrol will continue with the introduction ofa revamped and upgraded inspector’s course.We plan to introduce a new, more practical,entry level course for candidates that find themain course too technically difficult. Inaddition, a computer based interactive courseis to be launched in order to cater for plantoperators who have or could be given accessto a computer. This course will allowcandidates to progress at their own pace andat the same time not interfere with their dailywork attendance.During the month of February we werefortunate to be visited by Prof. StephenYeomans from New South Wales - Australia.Together with Association staff, the professorvisited Gauteng, Durban and Cape Town andengaged with numerous specifiers anduniversity students via a series of seminarsand presentations on hot dip galvanized rebarfor concrete. The country-wide market for hotdip galvanized reinforcing steel is growing andthe visit by the professor was most welcome.Corrosion investigations and reports continueto be an area that will receive our attention.Each case study is a learning experience thatis used to support future hot dip galvanizedsteel applications. An area of particularinterest for us at the Association is thecorrosive conditions found in many of ourmines. Corrosion of carbon steel within themining industry is particularly severe, wherehot dip galvanizing and duplex systems doprovide economical solutions.Readers of our magazine are encouraged touse the corrosion investigative services of theAssociation as we are committed to providingcritical, unbiased and objective reportswhenever galvanized and duplex coated steelsare used.Bob WilmotNote from theEditorIt was extremely gratifying to me that where hot dipgalvanizing had been used in the four stadiums that we havepictorially reported on, in many instances the boltedconnections used are mainly hot dip galvanized bolts, wherein the past due mostly to inappropriate, inconcisespecifications and non-availability of hot dip galvanizedfasteners, more zinc electroplated fasteners were used. Our feature on fasteners againaddresses this essential requirement.Also we wish to compliment the designers and fabricators of the various hot dipgalvanized componentry (in the stadiums) that they have to a large degree, understoodthe requirements of the hot dip galvanizing process, using modular design, with itsbenefits of appropriate sizing, ease of handling, minimisation of site coating repairs, etc.With the rigorous paint coating systems and guarantees now in place for some of thestadia, it goes without saying that we will be monitoring the performance of the tworespective corrosion control systems, over the next decade or so, particularly as the "allpaint coating system" has been applied to roof steelwork, which is relatively inaccessiblein most instances for future maintenance.At the Association we pride ourselves in providing cost effective advice in the use of ourcoatings and are always happy to be involved in the evaluation and inspection ofpreviously exposed and weathered hot dip galvanized or duplex coated components.Should a reader require this evaluation and inspection service, kindly contact Bob,Hendrik, myself or a number of our qualified Galvanizer Inspectors throughout thecountry (list available from the Association).Our features for this issue include, a pictorial review of the hot dip galvanizedcomponents installed at four of the major stadiums. Our regular Fastener AvailabilityMatrix, with some new fastener categories - we had hoped to have incorporated a seriesof shackles and turnbuckles that are either hot dip galvanized or appropriatelymechanically plated to achieve reasonable durability in corrosive atmospheres but wewill have to work on this for future issues.In our continuous wire feature we include a short account with respect to corrosionprotection on the 2009 version of SANS 675 versus the 1993 version. Also in this featureis an account on “Galfan” wire and its attributes.“Wamosha” includes a story of inappropriately used continuously hot dip galvanizedpurlins fixed to generally hot dip galvanized rafters in a corrosive marine atmosphereand the effects after nearly three years.We report on a recent brief tour by Prof. Stephen Yeomans from the University of SouthWales, Australia. Stephen, a world renowned authority on hot dip galvanizedreinforcement for concrete, who together with Association staff and Rob White of IZASAtoured the major centres and presented his ideas.Case History includes an evaluation and inspection of the hot dip galvanized seatingbrackets and handrails at Newlands Rugby Stadium after 31 years!Education and Training, expands on our certificated coating inspectors course, anessential requirement in any coating inspectors portfolio.Other regular articles include, Bob’s Banter, where Bob Andrew chats about “Likebacteria, the business community needs a common immune system”, Members News,where some members report on their involvement in the stadia.Should a reader wish to express an opinion or provide us with an article, or comment onour articles, kindly contact me –Due to lack of space Duplex Coatings, Coating Report, Guest Writer, “On the Couch”and Misconceptions are not included in this issue but will resume in subsequent issues.Enjoy the “magazinc”.Terry Smith2 Hot Dip Galvanizing Today Volume 7 Issue 1 2010