Understanding Waveforms, World Pipelines January 2020

Waveforms, or scopes, have been around in the world of close interval potential surveys (CIS/CIPS) for decades, but are often underutilised. A lack of knowledge about their usefulness is the main cause. The name associated with the data comes from the equipment used to obtain it. The reading is taken with an oscilloscope-like device (hence ‘scope read’), which displays and records the waveform of a set period. Many modern CIS instruments have this ability built in, making it easy to view and record a waveform during a survey.

Hexcorder Pro Wins NACE Corrosion Innovation of the Year Award

Cath-Tech is pleased to announce the Hexcorder Pro CIPS/DCVG/GPS pipeline integrity survey system has been presented with the NACE Corrosion Innovation of the Year Award 2019 at the recent NACE Corrosion 2019 Conference & Expo held in Nashville, Tennessee March 25...

New Visions for CIPS and DCVG

New instrumentation technology in the pipeline survey industry has helped produce and deliver results for the pipeline surveyor, analyst, and operator.   Elizabeth Nicholson, Cathodic Technology, Ltd.   As pipeline survey data increase with the use of close...

Notes From A Napkin in Shanghai- World Pipeline May 2017

Elizabeth Nicholson, Matthew Bechberger and Patrick Yaremko of Cathodic Technology Ltd. Canada, review the process of developing a new cathodic protection survey instrument from concept to market. Read Article   After a successful NACE conference in 2011, in a...

NACE 2017 New Orleans

Cath-Tech are proud to exhibit at the NACE 2017 Annual Corrosion Conference & Expo in New Orleans, LA., the world’s largest corrosion conference and exposition.  http://nacecorrosion.org/  Each year NACE welcome more than 6,000 corrosion engineers,...

A Fuzzy Logic Model Designed for Quantitative Risk Analysis based on ECDA Data

Elizabeth Nicholson, Corrosion 2015, Paper 5675

Describes a fuzzy logic model intended for quantitative risk analysis to the integrity of buried pipelines. The proposed approach correlates data from combined CIPS+DCVG coating surveys to the soil resistivity, in order to define an indicator that expresses the corrosion susceptibility at a given coating defect location. Inputs used in the mathematical model include: DCVG defect severity, CIPS pipe-to-soil “OFF” potentials and local soil electrical resistivity

Pipeline Integrity: Combining Coating Integrity and Cathodic Protection Surveys

Elizabeth Nicholson, Corcon 2014 Corrosion Conference & Expo, Mumbai

Many types of surveys are done to allow the operator to assess the condition of a pipeline.  Two surveys are essential to any pipeline integrity management program, coating integrity and cathodic polarization.  Coating integrity is investigated by generating a pulse on the pipeline, then walking the pipe to locate any voltage gradients in the soil. 

Two Halves of a Whole: Coatings and Cathodic Protection


Coatings prevent corrosion by creating a barrier between the structure and the electrolyte.  Cathodic protection works by changing the potential of the structure to interfere with the corrosion process.  Both work together to protect the structure.  Surveys can be done to evaluate the condition of the coating and of the cathodic protection. 

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