REMOVE ROUGE LAYER

Rouging is present in all those demineralized or special water / vapor distribution systems that are apparently not very aggressive but cause the problem to occur periodically. Even if not visible in the first months of activation of a plant, the flow in the pipes of these waters will cause the formation of more and more consistent rouge over time. For the aforementioned reason, the pharmaceutical and food industries are the most affected, despite the common use of systems made of stainless steel which, however, behave passively towards many products. Generally the pipes that make up the pharmaceutical plants are welded on site. This welding process leads to a partial removal of the passive film which requires, before starting the plant, a pickling and passivation treatment to restore the protective layer. Layer that allows you to start production with a good cleaning of the system which will, however, periodically need to carry out a derouging process to keep the surfaces uncontaminated.
An electropolished surface in fact allows easier removal of the created rouge, at the same time slowing down its formation.

The look?
The “rouge” comes in the form of a red coating, the classic color of rust, which is deposited mainly in the lower internal part of the pipes used for the flow of special water or steam. In addition to being aesthetically unpleasant, the presence of these contaminated particles in pharmaceutical or food production processes is certainly not acceptable, due to the high risk of bacterial proliferation.

The solution?
It is therefore essential to remove this layer of “rouge” with a high iron oxide content and create a new ultra-thin passive protective film containing high levels of chromium oxide. In the past, the use of products capable of guaranteeing good results but certainly more impacting from an environmental point of view was used. Today, reference is made to less aggressive chemical solutions, however able to provide excellent results, while respecting the environment and the original appearance of the metal, which will certainly be less opaque at the end of the process. These processes can be carried out manually by immersing the product to be treated in special tanks of variable size or, in the case of pipes, by circulating the anti-rouge solution inside them. Not only that, the innovative spray technique allows you to remove contamination after removing oxygen in the treatment area. This allows to carry out the treatment on pipes, autoclaves, production or storage containers or freeze-drying