Rouge, heat tint, scale and staining on operating stainless systems need assessment before chemistry selection. Cleansol identifies what is present, selects the appropriate approach and documents the work.
The Buyer Problem
Rouge is iron oxide contamination that migrates through a water system and deposits on wetted stainless surfaces. Heat tint is oxide from welding or thermal processing. Scale is mineral or chemical deposit from the process or service water. Staining can have multiple causes.
Applying the wrong chemistry to the wrong deposit can damage the base metal, drive contamination deeper or leave the underlying problem unresolved. Assessment before chemistry is not optional.
Conditions Addressed
When It Is Required
Assessment First, Chemistry Second
Cleansol does not commit to a derouging chemistry until the deposit type and the metallurgy are confirmed. No single acid system is universally appropriate. The assessment drives the approach, not the other way around.
Cleansol Scope of Work
The deposit type, distribution and severity are documented before chemistry selection. The metallurgy, system configuration and prior maintenance history are reviewed.
The derouging approach is selected based on the deposit type and the metallurgy. The customer reviews and approves the proposed chemistry before work begins.
Chemistry is applied under controlled conditions with time, temperature and concentration monitored and recorded per the approved procedure.
The system is rinsed and neutralized to the criteria in the project documents. Waste is characterized and managed per the approved disposal path.
Following derouging, re-passivation is performed to restore the passive layer on treated surfaces. The passivation scope follows the project specification and the passivation standard as applicable.
Verification testing per the specification is performed after re-passivation and results are recorded. Before and after documentation is assembled where permitted by site conditions and the NDA limits.
Before and After Photo Slots Pending Customer Approval
Representative before and after surface condition photography is pending approval from customers within NDA limits. Anonymized examples will be posted here when available.
Scope Alignment
Assessment, procedure development and approval, chemistry, temporary equipment, treatment, re-passivation, verification and documentation.
System access, operating history, prior treatment records, approval of proposed chemistry and acceptance criteria.
Metallurgy confirmation, specification requirements and resolution of design questions raised during the assessment.
System isolation, utilities, coordination with production schedule and approval for required downtime window.
Verification and Acceptance
Verification testing follows re-passivation, confirming the passive layer is restored. Test methods and acceptance criteria follow the project specification and the applicable passivation standard.
Turnover Deliverables
Documentation of deposit type, distribution and severity before treatment.
Derouging and re-passivation procedures with operating data.
Post-passivation test results against acceptance criteria.
Assembled in the closeout format agreed before execution.
Representative Project
Assessment of rouge class and distribution across the WFI loop ahead of periodic treatment. Chemistry selected per the deposit classification and customer specification. Derouging followed by citric re-passivation with verification testing. CLEANDOC package delivered with assessment report, procedures, operating logs and test results.
Related Services
Next Step
Send the system description, any available inspection findings, the metallurgy and the schedule window. Cleansol will identify what is needed for a proper assessment and recommend the appropriate next step.
We review project inquiries promptly and follow up as quickly as your project timeline allows.
