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The Farwest Current - May 2021

 
 
 
May 2021
 
Farwest Renews NSF 61 Certification
 
 
Did you know that Farwest maintains NSF61 certification for water tank cathodic protection products?
 
This certification confirms that our Impressed Current and Galvanic Cathodic Protection Systems used for Water Storage Tanks and Reservoirs are certified for use in potable water systems.
 
Farwest Giving Back
 
Farwest's Gordon Rankin Corrosion Engineering Scholarships Awarded to Three Students at Corrosion 2021
 
 
Donovan Fagan
University of Alberta
 
 
Margaret Blair Huck
Northeastern University
 
Trevor Tackett
Univ. of Texas - San Antonio
 
3 months ago

Newsletter April 2021

 
 
 
April 2021
 
CORROSION 2021 Virtual Conference & Expo
Is LIVE!
4 months ago

Farwest Corrosion Control Introduces Ref-Check VPR for Voltage Potential Restoration

Farwest Corrosion Control Company has introduced the Ref-Check VPR test instrument for Voltage Potential Restoration.  Farwest is an industry pioneer and leader in Cathodic Protection and Corrosion Control services for industries that maintain underground and underwater infrastructure, storage systems or other submerged metallic structures. The Ref-Check VPR is an advancement in a product line of instruments designed to overcome false or low potential readings from compromised cathodic protection reference electrodes (CPRE).
8 months ago

EXPERT TIP #13: TESTING PIPELINE CP SYSTEMS FOR BROKEN TEST WIRES

Corrosion technicians conduct routine operational status checks on Cathodic Protection (CP) Systems to ensure that the system is providing adequate levels of protection. Many common systems can include multiple 2-wire, magnesium anode test stations (1 wire for the anode and one wire for measuring Pipe-to-Soil (P/S) potentials) with simple 2-wire P/S test stations between the anode test stations. Normal potential readings should be between -0.950 and -1.150 volts with respect to a CuSO4 reference electrode along the pipeline.

9 months ago

EXPERT TIP #12: METALS USED IN CATHODIC PROTECTION

Metals

Many materials have been developed to mitigate corrosion in buried and submerged metals (pipelines, storage tanks, etc.) corrosion.  The development of corrosion resistant materials i.e., plastic composites, epoxies, urethanes and the like have significantly contributed to the industry. For many applications, the “non-metallic” products are used to simply replace the metal or are applied to the metal as protective coatings. Despite this, metals and their unique properties are still major players in the corrosion control industry. 

9 months ago

EXPERT TIP #11: USING PORTABLE INTERRUPTERS FOR CP RECTIFIERS & POWER SUPPLIES

Interrupters
An “interrupter” is a switch installed on Cathodic Protection (CP) rectifiers to enable the rectifier to be switched OFF and ON in a timed cycle. The interrupter switch can be a conventional mechanical (metallic contact) switch or an electronic, solid-state switch. The purpose of the Interrupter is to enable the CP technician to measure pipe-to-soil potentials in both an ON (CP current applied) & OFF (CP current interrupted) condition.  Referred to as an “interrupted survey”, the results of the survey reveal the effectiveness of the CP system within the influence range of the CP rectifier.

10 months ago

EXPERT TIP #10: BASICS OF INDUCED AC ON PIPELINES

Induced AC (Alternating Current) is a common problem that occurs when buried pipelines are installed in a common corridor or near energized high-power transmission lines. 

There are two main concerns with induced AC on metallic pipelines:

  1. Induced voltages can present a shock hazard to technicians who physically touch the pipeline or metallic devices connected to the pipeline.
  2. Induced AC is known to be the direct cause of soil side corrosion on buried pipelines.
10 months ago

Farwest Newsletter August 2020

In response to customer and colleague needs, we initiated Ask the Farwest Expert last April. This is a free service to answer questions, provide perspective and sort through the complexities of developing the right solution to cathodic protection and corrosion control issues. To-date, we have received a wide range of questions from burying magnesium anodes and measuring voltage across shunts to conducting underwater potential surveys and cathodic protection for carbon steel tanks. 
 
Hotline: (562) 674-3965 Email: Ask@FarwestCorrosion.com. For more details: click here
1 year ago

EXPERT TIP #9: HOW TO USE CATHODIC PROTECTION SHUNTS

Many cathodic protection (CP) technicians struggle with the proper way to read and interpret shunt measurements or readings. 

 The Basics

A shunt is a calibrated resistor of a known value, which is connected in series within an electrical circuit.  By measuring the voltage across the shunt (mathematical formula used to calculate the relationship between current, voltage, and resistance: Ohms Law), the magnitude of current flowing within the circuit can be calculated.

Because we cannot physically see volts, amperes or resistance, a comparison to something familiar like a water/hydraulic circuit, is being used to demonstrate the relationship.

1 year ago