Knowledge Center
Thanks to the Zinc Coating Life Predictor, a precise calculation can be made for any location in Belgium, the Netherlands and the Grand Duchy of Luxembourg starting from the climatic data and the composition of the atmosphere at the location in question. All these necessary starting elements are available to the user in convenient tables.
Choose “Prediction” and then “Accept” on this link and save the obtained table.
Now fill it in using the following 4 steps.
1. The climatic data, in particular
can be found in the tables below:
| Zinc Coating Life Predictor Klimatologische gegevens België |
||||
|---|---|---|---|---|
| Meetstation | Klimatologische gegevens | |||
| Nr | Naam | RV (%) | GT (°C) | N(mm) |
| 1 | Beauvechain | 81,7 | 9,2 | 747 |
| 2 | Bierset | 79,7 | 8,9 | 848 |
| 3 | Botrange | 85,2 | 5,7 | 1366 |
| 4 | Bree-Genk | 76,1 | 10 | 799 |
| 5 | Brustem | 81,3 | 9 | 709 |
| 6 | Chièvres | 82,7 | 9 | 772 |
| 7 | Deurne | 75,9 | 9,6 | 776 |
| 8 | Florennes | 80,9 | 8,2 | 919 |
| 9 | Kleine Brogel | 80,3 | 9 | 799 |
| 10 | Koksijde | 82,8 | 9,4 | 687 |
| 11 | Melsbroek | 78,8 | 9,8 | 724 |
| 12 | Middelkerke | 81,9 | 9 | 670 |
| 13 | Saint-Hubert | 83,6 | 6,8 | 1021 |
| 14 | Spa | 80,4 | 7,4 | 1127 |
| 15 | Ukkel | 80,2 | 9,9 | 780 |
| 16 | Virton | 77,1 | 8,7 | 873 |
| 17 | Werbomont | 80,8 | 7,2 | 967 |
| 18 | Wevelgem | 82,6 | 9,8 | 728 |
RH= relative humidity
GT= average temperature
N= precipitation
Source= RMI – Climatology Service
| Zinc Coating Life Predictor Klimatologische gegevens Nederland |
||||
|---|---|---|---|---|
| Meetstation | Klimatologische gegevens | |||
| Nr | Naam | RV (%) | GT (°C) | N(mm) |
| 210 | Valkenburg | 83 | 9,9 | 789,1 |
| 235 | De Kooy | 84 | 9,6 | 742,9 |
| 240 | Schiphol | 84 | 9,8 | 779,5 |
| 260 | De Bilt | 82 | 9,8 | 792,9 |
| 265 | Soesterberg | 81 | 9,6 | 831,1 |
| 270 | Leeuwarden | 85 | 9,2 | 767,2 |
| 275 | Deelen | 81 | 9,4 | |
| 280 | Eelde | 86 | 9 | 773,7 |
| 290 | Twenthe | 83 | 9,3 | 758,2 |
| 310 | Vlissingen | 82 | 10,4 | 720,8 |
| 344 | Rotterdam | 84 | 10 | 815,5 |
| 350 | Gilze-Rijen | 81 | 9,8 | 793,6 |
| 370 | Eindhoven | 81 | 9,9 | |
| 375 | Volkel | 82 | 9,8 | |
| 380 | Maastricht | 81 | 9,8 | 740 |
| LH5* | 83 | 9,7 | 754 | |
| LH15** | 83 | 9,7 | 770,6 | |
*LH5= average of 5 stations, i.e. Vlissingen, De Kooy, Eelde, De Bilt and Maastricht
**LH15= average of all 15 stations
RH= relative humidity
GT= average temperature
N= precipitation
Source= KNMI (www.knmi.nl)
| Zinc Coating Life Predictor Klimatologische gegevens Groothertogdom Luxemburg |
|||
|---|---|---|---|
| Meetstation | Klimatologische gegevens | ||
| Naam | RV (%) | GT (°C) | N(mm) |
| Luchthaven Luxemburg | 78 | 8,8 | 862,5 |
RH= relative humidity
GT= average temperature
N= precipitation
Source= Service Météorologique de l’Aéroport du Luxembourg
2. Choose the Deposition rate of chloride precipitation from the table below and further complete the Predictor table
Afstand tot vloedlijn Noordzee in meter | Indeling volgens ISO 9223, Tabel B.4 | Chlorideneerslag [mg/(m2.d)] |
|---|---|---|
| 0 – 200 | S2 | 150 |
| 200-5000 | S2 | 100 |
| 5000 – 50000 | S1 | 15 |
| 50000 en verder | S1 | 5 |
The values mentioned are applicable for the Benelux countries
3. For the SO2 (sulfur dioxide) content to be used, refer to the tables below.
You proceed as for the climatic data. If there is no monitoring station close to your location, you proceed via interpolation.
For most of Belgium, the SO₂ level in the air is expressed in µg/m3; from < 1 to 3. It is therefore best to choose 3 µg/m3 for the calculation. Since 1990, SO₂ emissions have decreased by about 80%. SO₂ is mainly released during combustion of the sulfur present in fuels. It causes acidification of the environment. However, some deviations can be observed that stem from site-specific conditions. This means that at certain locations the air concentration differs from what applies elsewhere in the country.
Below is an overview with the exceptions (measurements from 2003 to 2011). Current values are lower than those noted because they come from previous measurements.
| SO2-concentraties België | |
|---|---|
| Meetstation | SO2-concentraties |
| Naam | µg/m³ |
| Antwerpen-Ordamstraat: | 4 |
| Antwerpen-Polderdijkweg: | 6 |
| Hoboken | 4 |
| Charleroi Marcinelle | 4,5 |
| Engis | 4,5 |
| Seraing | 4 |
| Luik Saint Nicolas | 3,5 |
| Luik centrum | 7,5 |
| Luik Chénée | 4,5 |
| Beerse | 7,5 |
| Zelzate | 4,5 |
| Gent Destelbergen | 3,5 |
| Gent Wondelgem | 5 |
| Gent Rieme | 4,5 |
| Izegem | 5 |
| Sint-Denijs | 7,5 |
| Brussel Ukkel/Uccle | 4 |
| Brussel Centrum | 3,5 |
| Brussel Sint-Agatha Berchem | 5 |
| Brussel Zaventem | 7 |
| Ruisbroek | 5,5 |
| Knokke-Heist | 5,5 |
Source: data Environment Brussels (2025) and Flemish Environment Society (2024).
SO₂ concentrations Netherlands based on RIVM data from the year 2022.
For roughly 95% of the surface area of the Netherlands, the SO₂ content in the air is expressed in µg/m3; from < 1 to 2. For the calculation, therefore, it is best to choose 2 µg/m3.
Since 1990, emissions of SO₂ have decreased by 89%. SO₂ is mainly released during the combustion of sulfur present in fuels. It causes acidification of the environment.
However, there are some anomalies in the Netherlands. That is, there are specific locations where air concentrations are different from those applicable to the rest of the Netherlands.
Below is an overview of the most relevant exceptions (maximum measured value):
| SO2-concentraties België | |
|---|---|
| Meetstation | SO2-concentraties |
| Naam | µg/m³ |
| LUCHTHAVEN SCHIPHOL | 3,2 |
| INDUSTRIEGEBIED BARNEVELD | 16,2 |
| INDUSTRIEGEBIED MONTFOORT | 6,2 |
| INDUSTRIEGEBIED FARMSUM | 21,9 |
| TATA STEEL VELSEN NOORD | 6,3 |
| INDUSTRIEGEBIED ZALTBOMMEL | 4,2 |
| INDUSTRIEGEBIED DEN BOSCH | 3,2 |
| HELDEN / PANNINGEN | 3,5 |
| INDUSTRIEGEBIED ROERSTREEK | 2,1 |
| HAVENGEBIED VLAARDINGEN | 6,7 |
| MAASSTROOM ENERGIE PERNIS | 4,2 |
| ATM MOERDIJK | 2,3 |
| AVR AFVALVERWERKING BOTLOK | 5,4 |
Source: Large-scale concentration and deposition maps of the Netherlands – RIVM
htps://data.rivm.nl/apps/gcn/
For all of Luxembourg, the SO₂ content in the air is expressed in µg/m3; from < 1 to 2. So for the calculation, it is best to choose 2 µg/m3.
The SO₂ level in Luxembourg is as much as 7.6 times lower than the WHO guideline and is mainly released during the combustion of sulfur present in fuels. It causes acidification of the environment.
Source: data AQI (Air Quality Index) from the year 2024
4. There remains you to choose the “Sheltering condition”
(to air, under shelter or indoors)
Your table is now complete.
Press “submit” and enter the coating thickness in the upper right corner. To do this, select the minimum average coating thickness (µm) for the smallest steel wall thickness (mm) found in your structure (see table) and click “calculate life”.
| Voorwerp en dikte voorwerp | Plaatselijke deklaagdikte (minimum) µm | Plaatselijke deklaagmassa (minimum) g/m2 | Gemiddelde deklaagdikte (minimum) µm | Gemiddelde deklaagmassa (minimum) g/m2 |
|---|---|---|---|---|
| Staal > 6 mm | 70 | 505 | 85 | 610 |
| Staal > 3 mm tot 6 mm | 55 | 395 | 70 | 505 |
| Staal 1,5 mm tot 3 mm | 45 | 325 | 55 | 395 |
| Staal < 1,5 mm | 35 | 250 | 45 | 325 |
| Gietstukken 6 mm | 70 | 505 | 80 | 575 |
| Gietstukken < 6 mm | 60 | 430 | 70 | 505 |
NOTE:
This table is for general use: individual product standards may contain other requirements including different thickness categories. Requirements for local and average coating mass in this table are for information in disputes.
