DI NOER MMO Tubular Anodes

DI NOER MMO Tubular Anodes
-a high-reliability solution for long-term cathodic protection systems

1,Product Positioning

DI NOER https://dinoer-anodes.commixed-metal-oxide (MMO) tubular anodes are engineered for impressed-current cathodic protection (ICCP) in soil, fresh water, and mildly brackish environments. They are deployed on underground storage tanks, buried pipelines, dock sheet-pile walls, and other critical assets. With proven electrochemical stability and a predictable life curve, the product has ranked first in company shipments for five consecutive years and is recognized as DI NOER's flagship anode.

2,Core Technical Data

• Substrate: ASTM B338 Gr. 1 titanium tube, wall thickness ≥ 1.5 mm, yield strength ≥ 170 MPa
• Coating: IrO₂–Ta₂O₅ system, loading ≥ 12 g m⁻², chlorine-evolution potential ≤ 1.45 V vs. SCE
• Design current density: 100 A m⁻² (soil, 20 °C), continuous service life ≥ 20 years
• Size range: Ø25 mm × 1 m to Ø32 mm × 2.5 m, project-specific lengths available

3,Life-Management Model
Each anode is assigned a digital passport:

• Factory-measured polarization resistance (Rp) establishes a "grey" baseline.
• Quarterly uploads of operating voltage, current, and electrolyte pH allow a cloud algorithm to calculate the residual active coating area.
• When Rp declines to 60 % of baseline (white alert) or 40 % (red retirement), the system issues a maintenance directive.Field data show this approach reduces unplanned shutdowns by >90 %.

4,Quality Control & Certification

• Coating adhesion: ASTM D4541 cross-cut test, rating ≥ 4B
• Accelerated life test: NACE TM0108-2018, ≥ 20 000 h at 80 °C, 1 A cm⁻²
• Management system: ISO 9001 & ISO 45001 certified, 100 % batch traceability

5,Representative Project
In 2022, a Middle East gathering pipeline installed 1 440 pieces of Ø25 mm × 1.2 m MMO tubular anodes at a design current density of 110 mA m⁻². After 36 months of operation, site inspection revealed:

• Coating mass loss < 3 %
• Protection potential −950 mV CSE compliance 99.7 %
• System energy consumption 12 % lower than comparable high-silicon cast-iron anodes

6,Service Commitment
• Free technical-database updates throughout the 20-year design life
• Replacement plan within 48 h and anode delivery within 72 h after a red alert
• Global stock hubs in major ports; emergency order response ≤ 2 weeks

DI NOER https://dinoer-anodes.comMMO tubular anodes deliver a verifiable service life and a closed-loop service plan, giving clients a "zero-surprise" cathodic-protection barrier.