Australian Standards

Note: Hartway does not accept any responsibility for error.  The information supplied here is provided as a way to help inform the market.

There are many coating standards in Australia and the world. Some are client specific and others regional. Most of the hot dip galvanizing in Australia proceeds in line with the standard AS/NZ 4680:2006. There are other standards that are cited and a brief list of industry standards and what they are about is included below:

  1. GALVANIZING STANDARDS:

SYSTEM

REFERENCE   STANDARD

MINIMUM   THICKNESS MICRONS

COMMENTS

Hot   dip batch galvanizing

AS4680

HDG390

55

Post-fabrication   coating

HDG500

70

HDG600

85

 

 

 

 

 

Hot   dip galvanized sheet

AS1397

Z350

20

PGI   sheet

Z450

25

 

 

 

 

 

Electrogalvanized   tube

AS4750

ZE100

14

Patio   tube

ZE300

42

 

 

 

 

 

 

In-line   hot dip galvanized open sections

AS4791

-

 

cold   formed lintels

 

 

 

 

 

In-line   hot dipped hollow sections

AS4792

ZB100

14

Patio
  tube

ZB140

20

ZB300

42

 

 

 

 

 

Mechanical   plating

AS5056

-

25

 

 

 

 

 

 

Electroplated   coatings

AS1897

-

25

 

  1. AS/NZ 4680 - This is the governing standard for all Hot dip galvanizing on FABRICATED ferrous articles. There is 1998 and 2006. The 2006 is the most recent one and supercedes all others. This is batched and involves a STATIC immersion in a molten zinc bath. There are other galvanizing standards that relate to specialized and or continuous processes and these are: AS4534 - galvanized wire, AS4791 - inline process on open sections, AS4792 - continuous or specialized process for coating hollow sections - this relates to the pre-galvanized RHS and CHS sections commonly seen. AS 1397 is for sheet and strip products.
  2. AS/NZ 1650 - this is a very old Australian galvanizing standard and is superceded by the AS4680:2006.
  3. AS 2312 - this is an informative standard that offers advice on various corrosive environments in Australia and the coatings that are available and relevant to these environments.
  4. AS 1627 - this is a standard that deals with the preparation and pretreatment of surfaces. The relevant sections are : Part 1- removal of oil, grease and related contamination. Part 5 - Pickling of steel.
  5. AS 4312 - this deals with corrosivity zones in Australia.
  6. AS 3750 - this is for painting steel structures. The relevant section for galvanizing is section 9 and is the application of organic zinc-rich primers to steel. The galvanizing standard notes this standard as a way to determine suitable paints for the repair of galvanizing - sections A5 and B5.
  7. AS 3894.3 - determination of dry film thickness.
  8. AS 1214 - Hot dip galvanizing on metric coarse threaded fasteners.

There are many more and the Galvanizers Association Of Australia has a section on this. Please click the link to go to the GAA site : GAA site.