Chemical Inhibitors

Chemical Inhibitors for Corrosion Control

Chemical inhibitors for corrosion control

To reduce the corrosion rate of a metal exposed to that environment, a corrosion inhibitor may be used. An inhibitor is a substance that slows down a chemical or corrosion reaction.

Corrosion inhibitors are commonly added in small amounts to acids, cooling waters, steam, and many other environments, either continuously or intermittently to reduce the intensity of corrosion. They are generally applied to clean surfaces and allowed to penetrate and dry. And while they may be highly effective, many inhibitors are also toxic therefore precautions are important to protect one’s personal safety and the environment.

Inhibition can be used internally with carbon steel pipes and vessels as an economical corrosion control alternative to stainless steels and alloys, coatings, or non-metallic composites, and can often be implemented without disrupting a process. Inhibitors can also be used to protect against the corrosion of reinforced steel bars (rebar) within concrete.

As they are used to control serious corrosion in aggressive environments -- including those with acids, cooling waters, and steam -- major businesses using corrosion inhibitors include oil and gas exploration and production, petroleum refining, chemical manufacturing, heavy manufacturing, water treatment, and the product additive industries.


Reviews on Corrosion Science & Technology, Vol. 1, 2, & 3

This three-volume set of proceedings contains papers presented at the CORROSION/2004 technical symposium, "Reviews on Corrosion Inhibitor Science and Technology." Topics include synergism in mixed inhibitor applications, inhibition and cathodic protection, heterocyclic inhibitors for sulfuric and naphthenic acids.

Corrosion Inhibitors

Corrosion Inhibition-Theory and Practice, NACE Reference 7

Chemical Methods for Controlling Corrosion in Oil and Gas Activities

Industrial Water Treatment: New Trends, Challenges, and Solutions


MR-01-74-HD1995-SG, Recommendations for Selecting Inhibitors for Use as Sucker Rod Thread Lubricants

MR0174, Selecting Inhibitors for Use as Sucker-Rod Thread Lubricants

SP21469-2021, Corrosion Inhibition Selection and Management for Oil and Gas Production

ANSI/NACE SP0300-2016/ISO 16784-1:2006

NACE 6G198/SSPC-TR 2-1998-SG, Wet Abrasive Blast Cleaning

TM0208-2018-SG, Laboratory Test to Evaluate the Vapor-Inhibiting Ability of Volatile Corrosion Inhibitor Materials for Temporary Protection of Ferrous Metal Surfaces

Standards Development Committees

AMPP SC 20 Internal Corrosion Management
Develops and maintains standards, guides, and reports for the detection, prevention, and mitigation of internal corrosion of pipelines, tanks, and vessels. Prevention includes controlling the internal environment and/or chemical treatment.

AMPP SC 06 Process Industries
Develops and maintains standards, guides, and reports for corrosion prevention and control in process industries such as chemicals, pulp, paper, and biomass, pollution control, and waste processing. High temperature applications utilized in these industries are also addressed.

AMPP SC 04 Linings & Internal Coatings
Develops and maintains standards, guides and reports for linings and internal coatings commonly used in specialized internal environments such as steel tanks, pipelines, and vessels to protect from corrosion and/or chemical attack.

Also, AMPP Technical Communities of Interest – Inhibitors (Materials, Technical Subcommittee)