Expert Stainless Steel Solutions

As a division of the ISTECH Metal Finish Supervision Group, TECHYARA Marine provides global expertise in the technical inspection and surface remediation of stainless steel and duplex assets. Our specialized supervision services cover chemical tanker cargo tanks, marine equipment, Exhaust Gas Cleaning Systems (EGCS), and premium stainless steel finishes for the cruise and maritime industries.

Our Services & Specialisms

TECHYARA Marine provides comprehensive, world-class technical services for the maritime and offshore industry. We specialize in the maintenance, repair, and surface treatment of high-grade stainless steel (SS) and duplex systems. Our mobile expert teams are available 24/7 worldwide for both on-site execution and professional supervision.

1. Stainless Steel (SS) Cargo Tanks

We ensure your cargo tanks remain in optimal condition to prevent contamination and extend service life.

• Surface Treatment: Professional chemical pickling and passivation (according to ASTM A-380) to restore the protective chromium oxide layer.
• Mechanical Repair: Precision grinding, sanding, and power buffing/polishing to remove pitting, scratches, and surface roughness (Ra-value improvement).
• Specialized Cleaning: Removal of crystallized cargo residues (e.g., phosphoric acid / "Green" acid), blackening, and ferrous contamination.
• Refurbishment: Rehabilitation of corroded heating coils and tank internals.

2. SS Marine Scrubber Systems (EGCS)

Critical maintenance for Exhaust Gas Cleaning Systems to ensure IMO compliance and structural integrity.

• Emergency Repairs: 24/7 rapid response for welding repairs and troubleshooting of scrubber towers.
• Corrosion Management: Removal of localized corrosion and application of protective chemical treatments in harsh exhaust environments.
• Modification Works: Technical support and execution of structural modifications on existing scrubber installations.

3. SS Piping & Hydraulic Systems

Specialized care for the "veins" of your vessel.

• System Cleaning: Chemical technical cleaning (CTC) of cargo lines, steam pipes, and vent piping.
• Internal Inspection: Advanced endoscope camera inspections to assess the interior condition of piping systems.
• Hydraulic Lines: Specialized pickling and passivation of remote valve control hydraulic lines and associated equipment.

4. Inspections & Professional Reporting

Independent and technical assessments to safeguard your assets.

• Condition Surveys: Detailed stainless steel condition and corrosion damage inspections.
• Technical Testing:
  1. Passivity Testing: Oxilyser testing to verify the integrity of the passive layer.
  2. Ferroxyl Testing: Detection of free iron/ferrous contamination.
  3. Roughness Measurements: Surface roughness (Ra) testing to ensure cleaning efficiency.
  4. Weld Inspection: Non-Destructive Testing (NDT) and Dye-Check on critical weld seams.
• Reporting: Audit-ready, comprehensive inspection reports including corrosion analysis and maintenance advice.

5. Supervision & Project Management

Where we don't perform the labor, we provide the expertise.

• Shipyard Supervision: Overseeing local shipyard crews during the installation of heating coils or tank construction to ensure quality standards.
• Turn-Key Projects: Full management of complex surface treatment projects from initial inspection to final certification.
• Troubleshooting: Expert consultancy for persistent corrosion problems or cargo contamination issues.

Why TECHYARA Marine?

• Worldwide Reach: Our specialists travel globally to reach your vessel at sea, at anchor, or in dry dock.
• 24/7 Availability: Emergency response teams ready for immediate deployment.
• Material Experts: Deep knowledge of Stainless Steel, Duplex, and Aluminum behavior in maritime environments.
• Compliance: All works are carried out in accordance with IMO, IBC Code, and FOSFA requirements.

Specialized Supervision for Chemical Tankers

TECHYARA Marine acts as your independent technical partner during dry-docking or emergency shipyard stays. We bridge the gap between ship owners and shipyards, ensuring that complex repairs on high-grade stainless steel cargo tanks are executed to the highest industry standards.

Pre-Repair Inspection & Damage Assessment

Before any work begins, our supervisors conduct a thorough "Tank Entry" to map out the scope of work.

• Mapping Deficiencies: Precise identification of pitting, "shadowing," deep scratches, and localized corrosion.
• Repair Protocol: Developing a customized repair plan for the shipyard, specifying the exact grit-sequence and technical requirements for each area.

Shipyard Supervision: Power Buffing & Mechanical Repairs

The most critical part of SS tank restoration is the mechanical repair of the surface. We provide hands-on supervision of shipyard personnel during:

• Controlled Power Buffing: Oversight of specialized power buffing techniques to remove surface defects without compromising the base metal thickness.
• Ra-Value Management: Ensuring the shipyard achieves the required surface roughness (Ra < 2.0 um or better) to prevent future cargo adherence and "clingage."
• Abrasive Control: Strict monitoring of the materials used (ensuring only iron-free/chlorine-free abrasives) to prevent cross-contamination of the stainless steel.

Quality Assurance of Welding & Grinding

• Weld Seam Restoration: Supervising the grinding and polishing of new or repaired welds to ensure they are flush and free of porosity or undercut.
• Heat Tint Removal: Ensuring all Heat Affected Zones (HAZ) are mechanically and chemically treated to restore corrosion resistance.

Final Verification & Passivation Oversight

Once the shipyard completes the mechanical repairs, we oversee the final chemical treatment:

• Supervising Pickling & Passivation: Ensuring the correct contact times and chemical concentrations are used by the yard.
• Validation Testing: Conducting the final Oxilyser (Passivity) and Ferroxyl (Free-Iron) tests to certify the tank is "Cargo Ready."
• Comprehensive Reporting: Providing the vessel owner with a full technical dossier, including "Before & After" documentation and measurement logs, vital for vetting inspections and insurance.

Your Value Addition

"By placing TECHYARA Marine in a supervisory role, you prevent the risk of shipyard errors-such as using contaminated tools or incorrect polishing techniques-which can lead to catastrophic tank failure or cargo contamination. We ensure the yard delivers what you pay for."