VALUABLE THINGS FOR THE FUTUREAs a leading company in the field of corrosion prevention,Nakabohtec has been offering products to protect marinestructures, infrastructure-supporting pipelines, and similarstructures against corrosion since 1951. We aim to continueimproving our products on the basis of our long experienceand willingness to serve the industry and the environment forthe next generations. In addition, by preventing metal corrosion, we intend to contribute to the maintenance of earth environment, such as the protection of resources and conservationof energy. The management principle of our company is “business growth based on anticipating needs, innovation, and contributions to the society.” The catch phrase is “bridge betweenmaterials and environment.” Thus, we strive to offer highquality products that meet or exceed the safety concerns ofour clients.

ALWAYS SERIOUS ABOUT CLIENTS’ ISSUES...
SOLVING CORROSION PROBLEMS ISNAKABOHTEC’S BUSINESSClients’ needs are diverse and change over time. To solve the corrosion problems they are facing, we consider their needs and responses.
We tackle corrosion problems associated with the marine environment, salt damage, and on-shore and underground structures; moreover, we develop corrosion prevention methods to meet our clients’ needs.
Corrosion prevention is essential for asset management policies based on preventive maintenance ratherthan supportive care, and we are confident that we meet our clients’ expectations.

For marine constructions■ Object Facilities・Port and harbor steel structures(jetties, piers, seawalls)・Bridges, submerged caissons,vessels, and others■ Main Products・Cathodic protection (galvanicanode systems, impressedcurrent systems)・Heavy-duty covering protection(petrolatum tape and covering“PTC” systems,urethane resin and coveringsystems)

For pipelines that support infrastructures■ Object Facilities・Pipelines (gas, water,agriculture, and others)・Underground tanks and others■ Main Products・Cathodic protection (galvanicanode systems, impressedcurrent systems)・Cathodic protection with solarpower・Remote monitoring controlsystems

For concrete constructions under salt damage■ Object Facilities・Bridges (RC structures, PCstructures)・Port and harbor structures・Box culverts and others■ Main Products・Cathodic protection (galvanicanode systems, impressedcurrent systems)・Remote monitoring controlsystems

For plant facilities and gate facilities■ Object Facilities・Machinery and facilities(condensers, heat exchangers,and others)・Gate facility (dam weir,rivermouth weir, intake weir)・Other on-shore facilities■ Main Products・Cathodic protection (galvanicanode systems, impressedcurrent systems)・Coating protection (zinc anodeprotection “ZAP” tape, “ZAP”sticker, and others)・Marine antibiofouling systems・Electrolytic ferrous ion injectionsystems “NAFES”

A “TOTAL UNDERTAKING SYSTEM”TO APPLY OUR TECHNOLOGIESAND ACCUMULATED EXPERIENCECorrosion and corrosion prevention methods are diverse owing to environmental and service conditions.
To respond to the wide range of requirements, we have adopted a unique sales system called "totalundertaking system" to fine-tune our services.
1. Total service of investigation, construction countermeasures, and maintenance2. Establish the construction framework to meet the various job site requirements3. A lineup of corrosion prevention products applicable to different conditionsCombining the abovementioned factors enables us to have ahighly productive and reliable order intake system.

To understand thedeterioration ofstructures, past dataand diagnosis areused, and efficientinvestigation methods are proposed.

Investigation

We evaluate thedeterioration structures on the basis ofthe investigationresults and identifythe causal factors.
Highly knowledgeablemembers of our staffanalyze and evaluatethe data.

Testing,analysis,andevaluation

To extend the life of structures and facilities, Nakabohtecoffers clients many setups that unify investigation, countermeasures, and maintenance.

MonitoringandmaintenanceHigh priority is givento the performanceand maintenance ofthe corrosion protection system. Data areanalyzed and assessed and subsequently incorporatedin the maintenanceworks.

Construction

Proposecountermeasures

High-quality countermeasures areselected from our richproduct lineup thatcovers variousenvironments andapplication requirements. Furthermore,at construction sites,safety and environment concerns areaddressed.

Several types ofcountermeasures areproposed on thebasis of the deterioration of structures.
Subsequently, anoptimal solution isselected consideringfunctionality, workability, cost, performance, and otherfactors.

INVESTIGATIONGRASPING THE CONDITIONS OF DETERIORATION AND DAMAGEOF STRUCTURES AND FACILITIES AND REFERRING TO PASTDIAGNOSTIC DATE AND HISTORY, WE PROPOSE AND CONDUCTOPTIMAL INVESTIGATIONS.
Marine Structures

・Corrosion investigation (visual inspection, thicknessmeasurements, water quality investigations, and others)・Cathodic protection inspection (potential measurements, anode consumption investigation, and others)・Heavy-duty covering protection investigation (opencheck, petrolatum residual ratio measurements, andothers)・Others

Pipelines・Electrical investigations (electric railways and buriedpiping)・Corrosion environment investigations (mainly soil andunderground water)・Others

Concrete Structures・Appearance (visual inspection)・Reinforcing bar corrosion investigation (natural potential,polarization resistance, concrete resistivity, and others)・Core sampling (neutralization, salt content, compressive strength, and others)・Reinforcing bar position and covering depth investigation (radar method, chipping investigation, and others)・Others

TEST, ANALYSIS,AND EVALUATIONBY SWIFT ANALYSIS WITH DIAGNOSTIC TECHNIQUES THATTAKE ADVANTAGE OF STATE-OF-THE-ART EQUIPMENT ANDACCUMULATED EXPERTISE, WE DERIVE THE MOST EFFECTIVECORROSION PREVENTION COUNTERMEASURES.
New developments are being constantly introduced in the field of corrosion prevention technology. In addition,corrosion prevention methods are based on rigorous analytical techniques rather than experience and intuition.
Nakabohtec uses the finite-element method (FEM) to simulate corrosion and corrosion prevention and high-frequency inductively coupled plasma emission spectroscopy (ICP) to analyze corrosion products.

Electrical potential analysis using FEM

Example of output from FEM analysis

PROPOSAL OFCOUNTERMEASURESBASED ON DIAGNOSTIC RESULTS, WE PLAN AND PROPOSE PRECISECORROSION PREVENTION COUNTERMEASURES, WHICH SUITCOST PERFORMANCE AND ENVIRONMENT.
We start by understanding the clients’ needs to find the right solution to the corrosion problem at hand. We simulatethe corrosion conditions and solutions, evaluate the cost, and propose the optimal method. Our sales, technical, andresearch staff work together to address the clients’ needs.

Proposal of countermeasures by presentation

Scene of planningAPPLICATION OFCOUNTERMEASURESFOR THE CHILDREN IN THE FUTURE, WE PROTECT SUCCESSIVELYCONSTRUCTED PROPERTIES, MAINTAINING THEIR VALUE.
“PREVENT AND TRANSMIT” IS OUR MOTTO.
For marine constructionsMarine structures are exposed to intense corrosion, making corrosion prevention critical.
The aluminum alloy anode “ALAP” and “PTC” system developed by Nakabohtechas been applied and tested for many years to extend the life of marine structures.

The application of “PTC” system to steel sheet piles“ALAP” applied to steel pipe piles

For pipelines that support infrastructureGas, water, and oil are critical to industry and everyday life. Pipelines that deliver them may develop holes owingto stray current or macrocell corrosion. Thus, pipeline corrosion will not only affect the supply of gas, water, andoil but also lead to major accidents depending on the content.
Our cathodic protection system for underground facilities is a reliable technology that has been in operation formore than 50 years.

Pipeline corrosion protection with magnesium alloy anodes

Cathodic protection using solar power

For plant and gate facilitiesCondensers and heat exchangers in power or chemical plants, dams, weirs, and floodgates are critical to our country’s infrastructure. However, they are exposed to corrosion in seawater, fresh water, and soil and are in risk ofheavy corrosion owing to the combination of different metals.
Based on our corrosion prevention technology and rich product lineup, we provide optimal construction methodsapplicable to many complex corrosion cases.

Magnesium alloy anodes installed on a weir facility

Movable tank-type ferrous ion injection system(movable tank-type “NAFES”)

For concrete structures under salt damageConcrete structures, particularly bridges, must be durable and reliable.
However, concrete structures deteriorate owing to salt-induced corrosion of reinforcing bars.
Salt may come from the atmosphere or antifreezing agents.
Our cathodic protection technology is widely adopted as an effective means against salt damage.

Titanium anode ribbon mesh systemRibbon-shaped titanium electrodes coated with metaloxides are installed in grooves formed in concrete, andcurrent is fed by a DC power unit to the reinforcing barsvia the electrodes.

Thermal sprayed titanium anode systemHigh-purity titanium is coated on the concrete surfaceby an arc thermal spray to form a highly durableelectrode ﬁlm, and current is fed by a DC power unit tothe reinforcing bars via the electrode ﬁlm.

Aluminum panel anode system “ALAPANEL”Panel-shaped aluminum alloy anodes are ﬁtted on theconcrete surface to supply current from the anodessurface to the reinforcing bars. This system is uniqueas it does not require electric power.

MAINTENANCE(Monitoring)

WE CONSTRUCT THE OPTIMAL LIFE-CYCLE MANAGEMENTBY PERFORMING REGULAR MAINTENANCE.
Monitoring at regular intervals is critical to the long-term use of corrosion prevention systems.
Data are collected and stored and then used in the planning stages of protection works.
The Nakabohtec maintenance system has gained trust for its ease of use and high precision.

Monitoring the current at the anodes

Monitoring with “Pockereco”

NAKABOHTEC ACTIVELYPARTICIPATES INOVERSEAS PROJECTS

Our reliable technology is based on years of experienceand effective communication with worldwide users.
We work with our overseas business partners and developstate-of-the-art technologies for new foreign markets.

Iran

National Iranian Oil Company

Arak Reﬁnery Project, ICCPMalaysia

Petronas Penapisan (Melaka) Sdn. Bhd.

Design & Engineering Consultant for Melaka Reﬁnery Phase-1, ICCP

ThailandStar Petroleum Reﬁning Co., Ltd.

Star Petroleum Reﬁnery PJ, ICCP for tank bottom

Qatar

Qatar Liqueﬁed Gas Co., Ltd.

Qatargas Upstream Development onshore receivings, storage & loading facilities, ICCP

Indonesia

Pertamina

Balikpapan Reﬁnery 1 Upgrading, ICCP for U/G pipe

KuwaitPetrochemical Industries Company

KPP 1,000,000 Polypropylene, SACP for U/G pipe

ThailandRayong Oleﬁns Co., Ltd.

ROC Oleﬁns Plant, ICCP & SACP for tank bottom & U/G pipe

Qatar

Ras Laffan Liqueﬁed Natural Gas Co., Ltd.

Ras La?an Onshore Facilities Project, ICCP & SACP for tank bottom & U/G pipe

KuwaitKuwait National Petroleum Company

MAF Project, ICCP & SACP for tank bottom & U/G pipe

Malaysia

Aromatics Malaysia Sdn. Bhd.

KR-2 Project, ICCP & SACP for tank bottom & U/G pipe

Malaysia

Shell Reﬁning Co. (F.o.m) Bhd.

Port Dikson LRCC Project, ICCP & SACP for tank bottom & U/G pipe

Malaysia

Titan Petrochemicals (M) Sdn. Bhd.

Titan 2 LDPE PJ, ICCP & SACP for tank bottom & U/G pipe

Singapore

Sumitomo Chemical Singapore Pte. Ltd.

SMAG PJ, ICCP for U/G pipe

ThailandRayong Oleﬁns Co., Ltd.

ROC PJ, ICCP for tank bottom & U/G pipe

1998

Qatar

Ras Laffan Liqueﬁed Natural Gas Co., Ltd.

Ras Laffan Onshore Facilities Project, ICCP for tank bottom & U/G pipe

1999

JordanZai Water Treatment

Water Treatment Plant PJ, ICCP for U/G pipe

2001

India

Petronet LNG Ltd.

Dahej LNG Terminal, ICCP for tank bottom & rebar in concrete pile

2002～04

Vietnam

Electricity of Vietnam

Phu My II 1-4 Combined Cycle Power Project

2003

Qatar

Ras Laffan Liqueﬁed Natural Gas Co., Ltd.

Ras Laffan Onshore Expansion Project

2004

RussiaExxson Neftegas Limited

Sakhalin II Project

2005

Qatar

Qatar Gas Co., Ltd.

QG2 Onshore PJ-LNG storage facilities (EPC of LNG storage tank)

2005

Republic of Turkey

Ministry of Transportation (DHL)

Marmaray Project Contract BC-1

2006

Qatar

Ras Laffan Liqueﬁed Natural Gas Co., Ltd.

Ras Laffan Onshore Expansion Project train 5-7

2007

Papua New Guinea

PNG Taiheiyo Cement Limited

Corrosion protection of 10,000 tons jetty

2007

Madagascar

Port dʼEhoala S. A.

Integrated Growth Poles Project, Port of Ehoala Project

2008

Saudi Arabia

Rabigh Reﬁning and PetrochemicalCo. (SCEC & Saudi Aramco)

The Rabigh PC-1 Project

2008

Algeria

Sonatrach

GP1.Z Phase III ProjectSEEKING TECHNOLOGIES THATCONTRIBUTE TO THE NEXT GENERATION...

TC unit systemTo shorten the construction period, reduce environmental impact, and minimize costs, we havedeveloped a new linear anode system with animproved method for setting the anodes.
While conventional linear anode systems require grooves to be etched onto concrete surfaces in which the anodes are placed, the proposedsystem installs anodes on the concrete surfacewithout the use of grooves, thereby almost totally eliminating the dust and noise associatedwith grooves.
In addition, because the structure body surfaceremains uncovered, any change in conditionsother than deterioration by salt damage can beeasily detected visually.
Moreover, because anodes are placed insideFRP trays, durability and anode performancehave improved.

Urethane resin and covering systemVarious types of heavy-duty covering protection methods have been applied to existingstructures. Such methods depend on resins andface environmental or workability issues, suchas water pollution or expensive surface preparation.
This system that we developed is a super longterm durability coating protection method thatuses an insoluble urethane resin as a corrosionprevention layer and a FRP cover as a protection layer.
The method offers environment-friendly long-termcorrosion prevention and requires simple evenmanual surface preparation.

NAKABOHTEC KEEPS TAKING ON CHALLENGES

Flange-type platinized titanium electrodeThe Pollutant Release and Transfer Register(PRTR) law was revised in 2003. The law reduced the allowed maximum transactionvolume of substances from 5 t/year to 1 t/yearand required businesses to report the transfer/use/disposal status. Conventionally, leadalloys were used as anodes in the cathodic protection of plant facilities. However, they are oneof the subject substances in the PRTR law. Theflange-type platinized titanium anode is a newproduct developed to meet the current environmental requirements. This product satisfies environmental concerns and reduces the life-cyclecost because of the recycling and reuse of theelectrode parts.

“Pockereco” (Portable pocket recorder)Conventionally, cathodic protection devices formonitoring used analog processors. “Pockereco” was developed to increase the data processing speed and to obtain high-quality results.
The operation/process NAPLSIII software wassimultaneously developed. The software enables the personnel in the field to transmit electronic data to the office and quickly respond toclients.

Nakabohtec wishes to conserve the environmentfor the children in the future. Thus,we set specific targets and work on conservation activities.
Nakabohtec Corrosion Protecting Co., Ltd. Basic Environmental PolicyPrinciplePolicyNakabohtec embraces the slogan, “bridge between1. Nakabohtec strives to reduce the environmentalmaterials and environment,” and contributes to theload, stop, and prevent pollution in all its busilife extension of social capital, such as civil strucness activities.
tures, underground structures, machines, and2. Nakabohtec abides by laws, rules, regulations,equipment, through cathodic protection, coatingacts, and agreements and sets and implementsprotection, and others. While being engaged inits own targets.
such activities, we are fully aware of the environ3. Nakabohtec promotes the development and apmental impact of our activities. Thus, we at Nakplication of environment-friendly technologiesabohtec are strongly committed and engaged inand products.
environment conservation.
4. Nakabohtec forms organizations and frameworksto promote environmental conservation activities.
5. Nakabohtec informs all employees about the basicenvironmental policies, makes educationalcampaigns, and teaches the importance of environmental conservation to raise their awarenesslevel.

NAKABOHTEC CORROSION PROTECTING CO., LTD.