Cathodic Protection

ISO-9001:2015 Certificate no: 10233894

Introduction to Norimax Cathodic Protection Services

Norimax offers the full range of cathodic protection products and services such as sacrifical anodes (aluminium, zinc and magnesium anodes), impressed current equipment (transformer-rectifiers, platinised-titanium anodes, mixed metal oxide anodes, silicon-iron anodes, junction-boxes, electrical cables, bond-boxes, and cadwelds ), DCVG, CIPS, Soil Resistivity Surveys, Current Interruption Tests, Interference Testing, etc.
Norimax corrosion engineers offer cathodic protection engineering design capabilities to perform detailed engineering designs for new and upgrading CP systems for onshore & offshore oil & gas facilities, pipelines, marine facilities, ships, tanks, and bridges.
Norimax provides CP Remote Monitoring with Digitalized Cloud Data Acquisition System through TP-RMU and TRU-RMU installations.
Norimax corrosion engineers are certified NACE Corrosion Specialists, IMM Cathodic Protection Specialists, UK-registered Chartered Engineers, Malaysian-registered Professional Engineers, and UK-registered Chartered Environmentalist.
Norimax manufactures sacrificial aluminium and zinc anodes up to 500 kg (aluminium) and 1000 kg (zinc) in size for offshore oil-rigs and submarine pipelines, and smaller sizes for tanks, jetties, and ships.
Norimax offer turnkey design, supply, installation, testing & commissioning of sacrificial and impressed current CP systems
Norimax offers specialist services for design and supply of CP Retrofit systems.

Learn More

Contact us

Man performing maintenance under the bridge

Licenses and approvals

Norimax is licensed by PETRONAS for the supply of sacrificial anodes and cathodic protection systems.
Norimax has been audited and approved by Shell Global Solutions International as anode manufacturer for both shallow water and deepwater cathodic protection systems.
Norimax is recognized by all oil & gas operators in Malaysia as a leading Cathodic Protection Specialist.

What is Corrosion?

The deterioration or degradation of materials , usually metals because of a reaction with its environment.

Codes of standard

BS 7361 Part 1:1991 : Cathodic Protection : Code of Practice for Land and Marine Application
NACE RP – 0169 – 96 : Recommended Practice for Cathodic Protection for Buried Submerged Structures.
NACE RP – 01-76 : Control of Corrosion in Steel Fixed Offshore Platforms Associated With Petroleum Product
AS 2239 : Galvanic (Sacrificial) Anodes for Cathodic Protection
DNV RP B401 : Veritas Offshore Standards Cathodic Protection

CP Criteria

The NACE Standard RP0169-96 Section 6.2 provides a list of criteria for cathodic protection which indicate that adequate cathodic protection has been achieved on the structure. The criteria stated in NACE RP0169-96 is :

A negative cathodic potential of at least 800mV with the cathodic protection applied, this potential is measured with respect to a saturated Silver/Silver Chloride (Ag/AgCl) reference electrode contacting the electrolyte.

"This criteria means that the ‘ON’ potential should be -800mV or more negative with respect to Ag/AgCl referene cell."

How does CP work?

All metal surfaces contain anodic and cathodic sites. In the presence of a conductive electrolyte, direct current will flow from the anodic surface (ANODE) to the cathodic surface (CATHODES).
The anodic surface always corrode while the cathodic surface does not corrode.

Cathodic Protection can be achieved by

Galvanic Method (Sacrificial Anodes)
Impressed Current Method

Galvanic Method (Sacrificial Anodes)

Galvanic anode system employs metal alloys more reactive than steel. When these anodic metal alloys (magnesium, aluminium or zinc) are directly and electrically conne cted to the steel (cathode) and submerged (underground or underwater) a D.C current flows from the anode to the cathode.