Restore

Derouging of High-Purity Systems

Treat rouging deposits on your stainless steel surfaces with a strategy adapted to the phenomenon, the system, and its operating conditions.

Rouging forms an iron-enriched oxide film on stainless steel, particularly in high-purity water and clean steam systems. Its characterization, the surface condition, and operating conditions guide the treatment.

The Challenges

Benefits of the Treatment

Restore the Surface

Eliminate rouging deposits with a process adapted to the condition of the stainless steel.

Control the Intervention

Adapt the treatment to the system to control its impact on equipment and operations.

Preserve Over Time

Integrate derouging into a surface monitoring and maintenance strategy.

Your need

In Which Situations Should We Intervene?

An intervention is prepared based on the observed deposits, surface condition, and system history. The color of the deposits provides an observation cue but is not sufficient to determine the treatment.

Red, orange, brown, or dark deposits appear on stainless steel surfaces.
An inspection reveals a change in surface condition.
A planned shutdown provides an opportunity to restore surface conditions.
Rouging reappears and requires understanding its conditions of appearance.

Our Approach

A Treatment Defined for Your System

There is no single answer to rouging. The strategy depends on the observed phenomenon, surface condition, system configuration, and operating conditions.

Diagnose Rouging

Characterize the phenomenon, its extent, and the system’s history.

Define the Strategy

Evaluate system constraints and define the process, parameters, and circulation scheme.

Control the Intervention

Execute the treatment sequence and rinses according to a documented protocol.

Monitor & Follow-up

Verify effectiveness, document results, and define monitoring or prevention actions.

Understand Derouging

An Adapted and Documented Intervention

The choice of process depends on the nature of the rouging, the surface condition, and the characteristics of the system. Technochim masters various derouging processes, allowing the treatment to be adapted to the encountered conditions.

Prepare Critical Intervention Parameters

Intervention preparation integrates critical parameters: configuration and P&ID, circulation diagrams, materials in contact, available utilities, treatment parameters, HSE conditions, and control criteria.

Verify the Result and Organize Follow-up

After treatment, inspections document the results and support the return to service with your teams. When justified, a preventive maintenance strategy or the study of a solution such as PHOXAL can complement the intervention.

Affected Surfaces and Equipment

PW/WFI Loops

Clean Steam Networks

Process Tanks

Piping and Transfer Lines

Generators & Distillers

CIP Equipment

Technochim expertise

Comprehensive Expertise from Rouging to Restoration

Technochim combines phenomenon diagnosis, process selection, intervention engineering, treatment, control, and follow-up strategy. This approach allows the intervention to be adapted to the actual surface condition and system constraints.

Let's Talk About Your System

Describe the observed deposits, surface condition, treatment history, and operational constraints to prepare a derouging strategy adapted to your system.