Corrosion Inhibitor Dosing System

Introduction

The global annual cost of corrosion is estimated at US $ 2.5 trillion, equivalent to approximately 3.4 percent of global Gross Domestic Product (GDP). Time-tested and proven methodologies to control corrosion are corrosion inhibitors, coatings, cathodic protection, and materials. Corrosion inhibitors are the most effective strategies to control the internal corrosion of carbon steel pipelines and infrastructures of the oil and gas industry. The global corrosion inhibitors market is about USD 10 billion; the oil and gas industry uses about 90% corrosion inhibitors. The general objective of the course is to educate students to properly test, select, apply, and monitor corrosion inhibitors.

Objectives

Upon completion of this course, participants should be able to:

• Identify types of inhibitors and inhibitor mechanisms
• Understand the basic components of the corrosion inhibitor package
• Comprehend various properties affecting corrosion inhibitor performance in the laboratory and in the field (ASTM G170 and ASTM G205)
• Correlate field operating conditions and laboratory test conditions
• Recognize various laboratory methodologies to test corrosion inhibitors according to G170
• Perform tests using high shear stress tests including rotating cage (ASTM G184), rotating cylinder electrode (ASTM G185), jet impingement (ASTM G208), and flow loop
• Conduct tests using low shear stress tests including wheel test, static test, and rotating disc electrode (RDE)
• Evaluate secondary corrosion inhibitor properties including solubility, emulsion tendency, foaming tendency, partition coefficient, gunking, thermal stability, compatibility, toxicity, biodegradation, environmental friendliness (Green inhibitors), and bioaccumulation.
• Identify inhibitor interaction with other chemicals including biocides, foamers, defoamers, scale inhibitors, and dewaxing chemicals
• Grasp merits and demerits of various laboratory test methods
• Recognize the importance of knowing the precision and bias of laboratory tests (ASTM G202)
• Select inhibitors based on laboratory test data for field application
• Apply appropriate corrosion inhibitors in the field
  • Batch inhibitors and continuous corrosion inhibitors
  • Water soluble and oil soluble corrosion inhibitors. Their advantages and disadvantages
  • Corrosion inhibitors for gas systems
  • Corrosion inhibitors for sour systems and systems with elemental sulfur
  • Corrosion inhibitor application for gas systems
• Monitor inhibitor performance in the field using electrochemical (ASTM G96), electrical (ASTM G96), iron and manganese counts, and coupons
• Determine how much corrosion inhibitor decreases corrosion rate in the field

Evaluate side-effects of the corrosion inhibitors in field applications: foaming, emulsion, and the system changes.

Training Methodology

This is an interactive course. There will be open question and answer sessions, regular group exercises and activities, videos, case studies, and presentations on best practices. Participants will have the opportunity to share with the facilitator and other participants what works well and not so well for them, as well as work on issues from their own organizations. The online course is conducted online using MS-Teams/ClickMeeting.

Who Should Attend?

Students doing bachelors, master, and doctorate; laboratory technicians and technologists involved in conducting routine tests to evaluate corrosion inhibitors, biocides, scale inhibitors and other chemicals for oil and gas industry; and technologists involved in monitoring corrosion inhibitor performance in plants, vessels, equipment, and pipelines, and owner-operators using corrosion inhibitors to control internal corrosion as well as to meet regulatory compliance

Course Outline

• Importance of corrosion control and corrosion inhibitors
• Types of corrosion inhibitors
• Use of corrosion inhibitors in various sectors of oil and gas industry
• Properties affecting corrosion inhibitors in the laboratory
• Properties affecting corrosion inhibitors in the field
• Correlation between the performance of corrosion inhibitors in the laboratory and in the field
• Description of Laboratory Methodologies
• Low Shear Stress Tests
• High Shear Stress Tests
• Tests for evaluation of Secondary Corrosion Inhibitor Properties
• Evaluation of corrosion inhibitors with other oil field chemicals
• Precautions in using laboratory data on corrosion inhibitors
• Selection of corrosion inhibitors for field application
• Optimization of corrosion inhibitor dosage in the field
• Monitoring of corrosion inhibitors in the field
• Evaluation of side effects and side benefits of using corrosion inhibitors