Hot-dip galvanized steel has been effectively used for more than 150 years. The value of hot-dip galvanizing stems from the relative corrosion resistance of zinc, which, under most service conditions, is considerably better than those of iron and steel. In addition to forming a physical barrier against corrosion, zinc applied as a hot-dip galvanized coating cathodically protects exposed steel. Furthermore, galvanizing for protection of iron and steel is favored because of its low cost, the ease of application, and the extended maintenance-free service that it can provide.

Below is an indication as to the “life to first maintenance” for galvanised steel, because very few real-life situations are as pure as the headings in the table would suggest, this tabulation is a significant over-simplification. Nevertheless, it does provide a useful guide. Many environments can be a combination of two or more of those shown. Furthermore, locally extreme conditions may exist, which could have a severely adverse effect on the performance of the zinc, In these instances further protection with a recommended painted is recommended.
 

Typical period to first maintenance

Mass (g/m2) Coastal Industrial Suburban Internal
(note 2) and urban and rural
Years Wet and possibly polluted Dry and unpolluted
275 2-5 2-5 5-10 Note 3 20-50
350 2-5 2-5 5-10 Note 3 20-50
450 5-10 2-5 10-20 Note 3 20-50
600 10-20 5-10 20-50 Note 3 20-50

Notes: 1. The recommendations for period to first maintenance are based on the premise that the strength and integrity of the sheet would diminish after the period specified, unless maintenance was carried out.
2. Minimum average triple spot (including both surfaces).
3. Further protection with a suitable paint is essential for this kind of application.
4. The periods shown are based on theoretical weight loss as a result of natural weathering under test conditions.
PSP stock a range of galvanised sheets in various thicknesses and sizes as listed below
Thickness 1.00 1.20 1.50 2.00 2.50 3.00
Sheet Size


1000 x 3000 x x x

1250 x 2500 x x
1250 x 3000 x x x x x x
1250 x 3500 x x
1250 x 4000 x x x
 

Galvanised steel

Hot-dip galvanized steel has been effectively used for more than 150 years. The value of hot-dip galvanizing stems from the relative corrosion resistance of zinc, which, under most service conditions, is considerably better than those of iron and steel. In addition to forming a physical barrier against corrosion, zinc applied as a hot-dip galvanized coating cathodically protects exposed steel. Furthermore, galvanizing for protection of iron and steel is favored because of its low cost, the ease of application, and the extended maintenance-free service that it can provide.

Below is an indication as to the “life to first maintenance” for galvanised steel, because very few real-life situations are as pure as the headings in the table would suggest, this tabulation is a significant over-simplification. Nevertheless, it does provide a useful guide. Many environments can be a combination of two or more of those shown. Furthermore, locally extreme conditions may exist, which could have a severely adverse effect on the performance of the zinc, In these instances further protection with a recommended painted is recommended.

Galvatite Z typical period to first maintenance

Mass (g/m2)                       Coastal                                 Industrial                            Suburban                             Internal

(note 2)                                                                                and urban                            and rural

Years                                                                                       Wet and possibly polluted        Dry and unpolluted

275                          2-5                           2-5                           5-10                         Note 3                                      20-50

350                          2-5                           2-5                           5-10                         Note 3                                      20-50

450                          5-10                         2-5                           10-20                      Note 3                                      20-50

600                          10-20                       5-10                         20-50                     Note 3                                      20-50

Notes: 1. The recommendations for period to first maintenance are based on the premise that the strength and integrity of the sheet would diminish after the period specified, unless maintenance was carried out.

2. Minimum average triple spot (including both surfaces).

3. Further protection with a suitable paint is essential for this kind of application.

4. The periods shown are based on theoretical weight loss as a result of natural weathering under test conditions.

PSP stock a range of galvanised sheets in various thicknesses and sizes as listed below

. For more information please contact us.