EN 13858 Corrosion protection of metals — Non-electrolytically applied zinc flake coatings on iron or steel components
Designations
General
The designation shall consist of the following:
a) term “non-electrolytically applied”;
b) number of this European Standard, EN 13858;
c) hyphen (-);
d) chemical symbol of the basis metal;
e) stroke (/);
f) symbols for the zinc flake coating and the method of application, as well as any coatings that may be applied prior to or after deposition, separated by strokes for each stage in the coating sequence in the order of application. The coating designation includes the thickness of the coating in micrometers (µm).
Basis metal
The basis metal shall be designated by its chemical symbol or its principal constituent if an alloy. For example,Fe for iron and steel.
The specific alloy may be identified by its standard designation (for example, its UNS number as given in ASTM DS-56G, or its national or regional equivalent) placed between the symbols “< >”, for example, Fe<G434000>
Type of coating
| i | immersion application; |
| p | pneumatic application; |
| fl | flake; |
| yc | coating with chromate; |
| nc | coating without chromate; |
| T1 | paints, varnishes or similar coatings; |
| T2 | organic or inorganic sealants; |
| T3 | colour; |
| T4 | oil or other lubricants. |
Thickness of coating
Non-electrolytically applied zinc flake coating, by immersion or pneumatic processes, shall be designated by the symbol “Zn” with the prefix “fl” and a further prefix “i” or “p” for immersion and pneumatic application processes respectively, followed by a number giving the minimum local thickness of the coating in µm. For example, iflZn4 or pflZn4 designate zinc flake coatings with 4 µm thickness by immersion or pneumatic processes respectively. The minimum thickness of the zinc flake coating shall be in accordance with Table 1.
| Minimum test duration h | Minimum coating thickness a µm | |
| Coating with chromate flZnyc | Coating without chromate flZnnc | |
| 240 | 4 | 6 |
| 480 | 5 | 8 |
| 720 | 8 | 10 |
| 960 | 9 | 12 |
| a A coating mass per unit area may be converted to a thickness by use of the following factors: – coatings with chromate, 4,5 g/m2 = 1 µm thickness ; – coatings without chromate, 3,8 g/m2 = 1 µm thickness. | ||
Examples of coating designations
A non-electrolytically deposited zinc flake coating, applied by immersion process, of 4 µm thick on steel (Fe), with chromates:
Non-electrolytically applied zinc flake coating EN 13858 – Fe/iflZn4/yc
A non-electrolytically deposited zinc flake coating, without chromate, applied by pneumatic process, of 8 µm thick on high strength steel that is stress relieved at 210 °C for 3 h before the application of the coating with organic sealant (T2):
Non-electrolytically applied zinc flake coating EN 13858 – Fe/[SR(210)3]/pflZn8/nc/T2