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Corrosion Technical Bulletins

The following Corrosion Technical Bulletins offer detailed information and recommendations on the use of BlueScope Steel products. A summary of the contents of each Corrosion Technical Bulletin (CTB) is included for your reference.

Also available are General Technical Bulletins, Forming Technical Bulletins and Sustainability Technical Bulletins

Download Corrosion Technical Bulletin CTB 1 - General Introduction (138 KB)
Rev 3, November 2003

  • What is "Corrosion"?
  • Types of metallic coatings
  • Anodes & Cathodes

Download Corrosion Technical Bulletin CTB 2 - Galvanic Protection (139 KB)
Rev 3, November 2003

  • The galvanic cell
  • Galvanic series of metals and alloys in sea water

Download Corrosion Technical Bulletin CTB 3 - Zinc Coatings on Steel (232 KB)
Rev 3, November 2003

  • The reaction of zinc with atmospheric oxygen and moisture
  • Why zinc protects steel

Download Corrosion Technical Bulletin CTB 4 - Coating Thickness (230 KB)
Rev 3, November 2003

  • The relationship between coating thickness and product performance

Download Corrosion Technical Bulletin CTB 5 - Corrosion Resistance of Zinc in Water (144 KB)
Rev 4, November 2003

  • The corrosion rate of zinc in natural fresh water
  • The effect of both temperature and pH on the corrosion rate of zinc is explained

Download Corrosion Technical Bulletin CTB 6 - Aluminium Zinc coating on Steel (350 KB)
Rev 3, Nov 2003

  • Coating structure
  • Corrosion performance of ZINCALUME® steel coating
  • Galvanic protection of steel by ZINCALUME® steel coatings

Download Corrosion Technical Bulletin CTB 7 - Barrier Coatings (233 KB)
Rev 4, November 2003

  • Barrier Protection offered by COLORBOND® prepainted steel
  • Brief description of how COLORBOND® steel is produced

Download Corrosion Technical Bulletin CTB 8 - Building Applications (275 KB)
Rev 2, November 2003

  • Material selection
  • Design
  • Unwashed Areas
  • End lapping and slip sheets
  • Pitch transition flashing
  • Low pitched roofing
  • Expansion joints

Download Corrosion Technical Bulletin CTB 9 - Contact With Unprotected Steel Supports (236 KB)
Rev 3, November 2003

  • Why supporting steel structures for ZINCALUME® steel and COLORBOND® steel must be coated
  • BlueScope Steel recommendations for purlins in contact with BlueScope Steel products

Download Corrosion Technical Bulletin CTB 10 - Roof Penetrations (230 KB)
Rev 3, November 2003

  • The effect of copper ions on ZINCALUME® and COLORBOND® steel
  • The pitfalls of roof penetrations

Download Corrosion Technical Bulletin CTB 11 - Condensation and Insulation (390 KB)
Rev 4, May 2007

  • The condensation cycle in both temperate and tropical environments
  • The correct installation of roof insulation

Download Corrosion Technical Bulletin CTB 12 - Dissimilar Metals (283 KB)
Rev 3, November 2003

  • The basis of dissimilar metal corrosion with reference to the galvanic series of metals and alloys in sea water
  • Table of compatibility of direct contact between metals or alloys when choosing fasteners and accessories

Download Corrosion Technical Bulletin CTB 13 - Contact With Timber (363 KB)
Rev 4, April 2008

  • Green timber in contact with BlueScope Steel Products
  • Contact with CCA treated timber
  • Fasteners and "Wet Timber"

Download Corrosion Technical Bulletin CTB 14 - Exhaust From Wood and Oil Fired Burners (259 KB)
Rev 3, November 2003

  • Fallout from boilers and heaters
  • Flue design
  • Effects of inefficient combustion

Download Corrosion Technical Bulletin CTB 15 - Acid Cleaning Brickwork (130 KB)
Rev 3, November 2003

  • How BlueScope Steel products are damaged during brick cleaning
  • BlueScope Steel recommendations to help avoid damage to ZINCALUME® steel and COLORBOND® steel

Download Corrosion Technical Bulletin CTB 16 - Immersion (289 KB)
Rev 4, November 2003

  • What is "Immersion"
  • Examples of Immersion - concrete, soil, water, ponding

Download Corrosion Technical Bulletin CTB 17 - Following Trades (147 KB)
Rev 4, November 2003

  • Possible damage to competently installed roofs by following trades
  • Air-conditioning units
  • Walkways
  • Copper penetrations

Download Corrosion Technical Bulletin CTB 18 - Painting Lead Flashing (230 KB)
Rev 3, November 2003

  • Why paint lead flashing
  • Possible Alternatives

Download Corrosion Technical Bulletin CTB 19 - Roof Profile Closures (231 KB)
Rev 3, November 2003

  • Stop ending or bending up of the upper end of roof sheeting
  • Metal stop ends
  • Profiled closed cell foam filler strips

Download Corrosion Technical Bulletin CTB 20 - Perforated Coated Steel (230 KB)
Rev 3, November 2003

  • Why BlueScope Steel does not supply perforated products
Download Corrosion Technical Bulletin CTB 21 - Special Service Environments: Enclosed Swimming Pool Buildings (230 KB)
Rev 3, November 2003
  • Problems with design and maintenance of enclosed swimming pool buildings
Download Corrosion Technical Bulletin CTB 22 - Special Service Environments: Intensive Animal Farming (237 KB)
Rev 3, November 2003
  • Intensive animal farms can be exceptionally corrosive environments
  • Recommended products
Download Corrosion Technical Bulletin CTB 23 - Concrete Decking (147 KB)
Rev 4, February 2004
  • Galvanised material and concrete decking
  • Problem areas
  • Poor detailing
  • The bottom surface being an "unwashed area"
  • Incorrect edge detailing
Download Corrosion Technical Bulletin CTB 24 - Fertiliser Manufacturing and Storage Buildings (141 KB)
Rev 3, November 2003
  • Product recommendations
  • Purlin specification and treatment
  • Design hints
  • End lapping of roof sheeting
  • Warranty conditions

Download Corrosion Technical Bulletin CTB 25 - Rainwater Catchment (326 KB)
Rev 0, June 2008

  • Introduction
  • What happens to rainwater
  • Effect of catchment material
  • BlueScope Steel Research laboratory studies
  • A case study