Corrosion protection

A system is a set of compatible coats that together give the required durability: the primer holds adhesion and protects steel, the intermediate coat builds barrier thickness, the topcoat protects against UV and weather. A single paint, even applied thick, usually cannot do all of this.

Define the corrosivity category under ISO 12944-2 and the durability you need, then consider the substrate, the possible preparation and the application conditions. Ready Teping® systems with total thickness and durability are in the selector at the top of this section; for special conditions our technologist selects the system. More in How to choose a protective system.

No. It is a planning figure for the time to first major maintenance. A warranty period is agreed separately in the contract and depends on surface preparation, application and service conditions.

If it gives a degree of aggressiveness under SP 28.13330, it can be converted approximately to an ISO 12944 category. If there is nothing, describe the structure: inside or outside, humidity, distance to the sea, gases and chemicals. Our technologist will define the category and propose a system.

Only after a compatibility check. Changing a coat affects adhesion, resistance and the durability of the whole system, so the figures in the technical data sheet no longer apply to such a system.

Loose rust and flaking mill scale are always removed. Over tightly adhering rust after St 2–St 3 cleaning you can apply Teping EP-Coat Mastic or the penetrating primer Teping PU-Coat Primer RP. For long durability, blast cleaning is more reliable.

Zinc in the primer corrodes instead of the steel and protects it cathodically, even where the coating is damaged down to the metal. That is why Teping EP-Coat Primer Zinc goes first in systems for C4–C5 and long durability. It requires blast cleaning to Sa 2½.

Yes, within the TDS. Teping® epoxy products may be applied down to −10 °C, while the polyurethane primers and Teping PU-Coat Top cure with air moisture and work at high humidity. What matters is steel free of frost and ice, 3 °C warmer than the dew point, and paint kept warm before use.

The painter checks the wet film with a comb gauge during application and the dry film with a gauge after drying, by the ISO 19840 80/20 rule: the mean not below nominal, no reading below 80 % of nominal. More in Application and quality control.

Yes, this is a duplex system: zinc and coating together last longer than either alone. The surface is cleaned of zinc salts and grease and, for long durability, roughened by light sweep blasting. Agree the system for galvanizing with our technologist.

Preparation, temperature and thickness are easier to control in the shop, so the primer and intermediate coat are best applied there: Teping EP-Coat Primer suits shop application. On site, transport and welding damage is repaired and the topcoat applied.

Inspect the coating regularly and repair locally before rust creeps under the film: clean to St 3, apply primer or Teping EP-Coat Mastic and a topcoat with an overlap onto the sound coating. Timely repair extends the time to major maintenance.

SP 28.13330 is the Russian code for building structures: it sets the degree of aggressiveness of the environment and the protection requirements. ISO 12944 (GOST 34667) classifies the environment into categories C1–CX and links them with system durability. Designs often use both: the degree of aggressiveness under SP 28 and the system under ISO 12944.

Technical data sheets and application instructions are open on the product pages. The safety data sheet (SDS) is provided on request, as are certificates and registration documents.