Menu
Search
Filters
Close
Menu

Save 20% on select titles with code HIDDEN24 - Shop The Sale Now

The Risk of Using Cathodic Metallic Coatings on Carbon Steel for Internal Corrosion Protection in Corrosive Environments

Picture for The Risk of Using Cathodic Metallic Coatings on Carbon Steel for Internal Corrosion Protection in Corrosive Environments
Available for download

Metallic coatings are frequently used on carbon steel and other metallic and non-metallic substrates for corrosion control, decorative or aesthetic purposes. The coating metal commonly used includes Zn, Al, Cu, Ni, Cr, Ag, Au, etc., singly or sometime in combination. When one of these metal coatings is applied on a metallic substrate, it is very important to consider the relative positions of the coating material and the substrate in the galvanic or EMF series.

Product Number: 51323-19042-SG
Author: Moavin Islam, Amal Al-Borno
Publication Date: 2023
$0.00
$20.00
$20.00

Metallic coatings such as Zn, Al, Cu, Ni, Cr, Ag, Au, etc. are used on carbon steel and other metallic and non-metallic substrates for corrosion control, decorative or aesthetic purposes. In the context of carbon steel, Zn and Al coatings are anodic in nature while Ni, Cr, Ag, and some other coatings are cathodic in nature. Metallic coatings on steel can be applied by using an electrical process (e.g. electroplating of Ni or Cr) or a non-electrical process (e.g. application of Zn on steel by hot dip galvanizing or the application of Ni coating on steel through chemical deposition, also known as Electroless Ni plating).


Electroless Ni (EN) plating produces a very thin, uniform, adherent hard coating on the surface of carbon steel components even with intricate geometries, and on the internals of valves and piping. As such, the use of EN coatings as a corrosion control option in mildly corrosive environments is quite popular and prevalent. However, in very corrosive environments, the use of EN coatings or other cathodic coatings on steel is very risky since any breach of the coating will lead to accelerated localized (galvanic) attack of the substrate. A case study involving the failure of EN coated carbon steel fittings installed on the composite piping system of an oil and gas production facility is presented which will show how severe and rapid this localized attack can be, resulting in the through wall corrosion failure of multiple fittings.

Metallic coatings such as Zn, Al, Cu, Ni, Cr, Ag, Au, etc. are used on carbon steel and other metallic and non-metallic substrates for corrosion control, decorative or aesthetic purposes. In the context of carbon steel, Zn and Al coatings are anodic in nature while Ni, Cr, Ag, and some other coatings are cathodic in nature. Metallic coatings on steel can be applied by using an electrical process (e.g. electroplating of Ni or Cr) or a non-electrical process (e.g. application of Zn on steel by hot dip galvanizing or the application of Ni coating on steel through chemical deposition, also known as Electroless Ni plating).


Electroless Ni (EN) plating produces a very thin, uniform, adherent hard coating on the surface of carbon steel components even with intricate geometries, and on the internals of valves and piping. As such, the use of EN coatings as a corrosion control option in mildly corrosive environments is quite popular and prevalent. However, in very corrosive environments, the use of EN coatings or other cathodic coatings on steel is very risky since any breach of the coating will lead to accelerated localized (galvanic) attack of the substrate. A case study involving the failure of EN coated carbon steel fittings installed on the composite piping system of an oil and gas production facility is presented which will show how severe and rapid this localized attack can be, resulting in the through wall corrosion failure of multiple fittings.

Product tags
Also Purchased
Picture for Comparison of the Test Severity of HLP Test Solution and NACE TM0284-2016 Test Solution C in HIC Testing
Available for download

Comparison of the Test Severity of HLP Test Solution and NACE TM0284-2016 Test Solution C in HIC Testing

Product Number: 51323-19026-SG
Author: Thomas Haase, Christoph Bosch, Christoph Kalwa
Publication Date: 2023
$20.00

Steel pipelines designated for the transport of oil and gas containing wet hydrogen sulfide (H2S) are faced
with the risk of sudden and severe cracking. In sour environments containing water and H2S, hydrogen
atoms, originating from the anodic dissolution of the material, can diffuse into the steel and induce severe
damage. Different forms of cracking may occur, such as Hydrogen Induced Cracking (HIC), Sulfide
Stress Cracking (SSC) or Stress Oriented Hydrogen Induced Cracking (SOHIC).
Picture for Variables That Can Affect Pull Off Adhesion of Coatings
Available for download

Variables That Can Affect Pull Off Adhesion of Coatings

Product Number: 51323-19147-SG
Author: Swapnil Shukla, Nicole Rakers, Michael McCarthy, Bernard McPeak
Publication Date: 2023
$20.00

Adhesion is a physical property that is crucial in many coatings, sealants, and adhesive applications, be it automotive, marine, or aerospace for example. Pull-off adhesion testing is an important tool in evaluating a coating’s performance, particularly while comparing pre- and post-exposure results. No matter what the application, the method for testing adhesion along with selecting the appropriate testing criteria has been the subject of multiple studies and reviews in the historical literature.
Picture for Risk Based Approach to Corrosion Prevention and Control for US Army Acquisition
Available for download

Risk Based Approach to Corrosion Prevention and Control for US Army Acquisition

Product Number: 51323-18922-SG
Author: Sam Conner
Publication Date: 2023
$20.00

Army Regulation (AR) 11-42, Army Corrosion Prevention and Control Program, requires that program managers and engineers use a risk-based approach (RBA) to identify the corrosion susceptibility on critical components and the consequence to the overall system. Department of the Army Pamphlet (DA PAM) 11-42 provides an example of generic procedures for conducting a risk-based approach. The goal of this project was to develop a detailed, standardized process for conducting a risk-based approach during CPC planning.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support