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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 and Forming 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, March 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