11
Pumps & Pipes 1 November 12, 2007 Corrosion and Scale
Pumps & Pipes 1November 12, 2007
Corrosion and Scale
Pumps & Pipes 1November 12, 2007
Pumps & Pipes 1November 12, 2007
We Are Also In the Fluids Business
Producing Transporting
Storing Processing
Pumps & Pipes 1November 12, 2007
Pumps & Pipes 1November 12, 2007
Containment Integrity Unimpeded Flow
With Similar Imperatives
Pumps & Pipes 1November 12, 2007
Pumps & Pipes 1November 12, 2007
Types of Corrosion
General Localized Pitting Cracking
Pumps & Pipes 1November 12, 2007
Causes of Corrosion and Cracking
Electrochemistry
Water
Salt
Low pH (CO2, H2S)
Load forces (stress)
Embrittlement Hydrogen
H2S
Chlorides
Electrochemical cell Hydrogen embrittlement
Pumps & Pipes 1November 12, 2007
Managing Corrosion
Condition the fluids, keeping them non-corrosive pH control
Method or Practice Example
Non-corroding materials Corrosion resistant alloys
Film forming inhibitors Water treating chemicals
Coatings Paint, plastic linings
Corrosion Coupons
Pumps & Pipes 1November 12, 2007
Corrosion “Holy Grails”
Corrosion free materials that are: 1. As strong as carbon steel
2. Economic for very large projects
Indestructible coatings: 1. Impervious to everything
2. Will not scratch, chip, or tear
Magic inhibitors: 1. Effective at very small doses
2. Forming impervious barriers
Pumps & Pipes 1November 12, 2007
Oil & Gas “Artery Blockers”
Mineral Scale Wax & Organics Gas Hydrates
Controlling or conditioning produced water
Mitigate by
Mitigate by
Temperature control (insulation)
Mitigate by
Temperature and pressure control
Pipeline scraping pig
Pumps & Pipes 1November 12, 2007
To Use a Football Analogy
The Current Score Would Be:
Pumps & Pipes 1November 12, 2007
To Use a Football Analogy
The Current Score Would Be:
Corrosion and Scale
56
Oil & Gas Industry
7
(With no Heisman Trophies In Sight)
Pumps & Pipes 1November 12, 2007
To Use a Football Analogy
The Current Score Would Be:
Corrosion and Scale
56
Oil & Gas Industry
7
(With no Heisman Trophies In Sight)
Any ideas?
