Translation of "Rotrost" in English

Red rust here describes the red colored corrosion products of iron, typically iron oxide.

The best-known product of corrosion is red rust.

The coating guarantees a durability of 192 hours in salt spray test without red rust.

It provides up to 400 hours of salt spray resistance per ASTM B-117, without evidence of red rust.

The corrosion resistance is 480 h against red rust.

These layers easily reach 480 h in the salt spray test against red rust.

Parameters investigated and evaluated were the development of red rust both at the scribe mark and in the surface.

In combination with the suitable plating thickness of the zinciron coating a high protection against red rust.

In that case, phosphating is expected considerably to delay or suppress the appearance of "white rust" (formation of zinc corrosion products) as well as "red rust" (iron corrosion products).

After 55 hour salt spray testing, the phosphated unlacquered sample showed white rust over approximately 40% of its surface and red rust over approximately 10% of its surface.

The zinc/nickel surface used for all Stauff components as a standard guarantees over 1,200 hours resistance against red rust/base metal corrosion in standardised salt spray tests, ensuring the durability of the connection. It can be used with all common hydraulic media.

The results show the number of hours that the material can withstand a sprayed saline solution before visible white rust (zinc oxide) and red rust (ferric oxide) are formed.

Using the additional top coats such as Delta Seal and Delta Protekt VH, which are specially designed for the base coats, the corrosion resistances to white and red rust can be increased.

Parts plated with approximately 0.013mm (0.0005) thick zinc-alloy with bright chromate and sealer have, on average, exceeded 300 hours of salt spray testing (ASTM B-117) and 4 cycles of moist sulfur-dioxide testing (ASTM G-87) without evidence of red rust.

The result verified resistance to white rust for around 96 hours and to red rust for around 300 hours.

In this case, the achieved elemental loading relative both to zirconium and to copper is reduced in such a manner that appreciable red rust is formed in the “process water test” (B6).

It is first of all clear from Table 1 that while chromium-free agents containing no copper ions (VB1) do indeed bring about an adequate elemental loading of >20 mg/m 2 on the steel surface, such a conversion layer cannot completely suppress the occurrence of red rust.

Conversely, clearly recognizable red rust is formed in the “process water test” on macroscopic defects due to inadequate formation of the layer or to passivation layers which are too thin overall.

An assessment is then made as to what kind of rust (red rust, black rust, white rust) has developed in the edge region and what percentage area is affected by the rust.

An assessment is then made as to what kind of rust (red rust, black rust, white rust) has developed in the edge region and what percentage area is affected by the rust.

Coated steel will show red rust (iron oxide) once the coating loses its protective ability and the underlying steel starts corroding.

The new surface protection system is ideally suited to manufacturing processes and with coating layers of 8 - 15 µm thick offers protection of at least 360 hours against coating corrosion (white rust) and 720 hours against base metal corrosion (red rust) as defined in DIN EN ISO 9227, plus optimised thread-fastening qualities through the setting of defined coefficients of friction.

Red rust is prevented from forming, and resistance to aggressive acids and caustic solutions is greater due to non-porous protective coatings.

More than 300 hours of resistance to red rust by the zinc/iron coating in the salt-spray chamber outperforms the usual chromating and phosphating on the market many times over.

Even with extremely thin coats – typically a system consists of a base coat and topcoat of 8 – 12 µm – it is possible to achieve protective effects against base metal corrosion (red rust) - as per DIN EN ISO 9227 - of up to 1,000 hours.

Stauff, one of the leading manufacturers of line components and hydraulic accessories, based in Werdohl/Germany, has been using a zinc/nickel surface coating for steel components for over ten years, which offers extremely good protection against red rust or base metal corrosion, even compared to other manufacturers' zinc/nickel coatings.

With at least 720 hours resistance against red rust, the Zinc/Nickel coating offers excellent surface protection far beyond the previous market standards – even after transport, handling and assembly.