Corrosion and Scale, pumpsandpipesmdhc

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Pumps & Pipes 1November 12, 2007

Corrosion and Scale

We Are Also In the Fluids Business

Producing Transporting

Storing Processing

Containment Integrity Unimpeded Flow

With Similar Imperatives

Types of Corrosion

General Localized Pitting Cracking

Causes of Corrosion and Cracking

Electrochemistry

Low pH (CO2, H2S)

Load forces (stress)

Embrittlement Hydrogen

Chlorides

Electrochemical cell Hydrogen embrittlement

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

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

Oil & Gas “Artery Blockers”

Mineral Scale Wax & Organics Gas Hydrates

Controlling or conditioning produced water

Mitigate by

Temperature control (insulation)

Mitigate by

Temperature and pressure control

Pipeline scraping pig

To Use a Football Analogy

The Current Score Would Be:

Corrosion and Scale

Oil & Gas Industry

(With no Heisman Trophies In Sight)

Corrosion and Scale

Oil & Gas Industry

(With no Heisman Trophies In Sight)

Any ideas?