Disbonding - Corrosionpedia
2024年7月19日 · What Does Disbonding Mean? Disbonding is the failure of a coating to adhere to the substrate to which it was applied. It is a loss of adhesion between a cathodic coating and its metal substrate due to a cathodic reduction reaction (corrosion reaction) taking place.
Cathodic Disbondment - Corrosionpedia
2024年7月19日 · Cathodic disbondment is the loss of adhesion between a cathodic coating and its metal substrate due to the products of cathodic reduction reaction (corrosion reaction) that take place in the interface of coatings. Cathodic protection (CP) systems are installed to prevent corrosion of metal.
Evaluating a Coating’s Resistance to Cathodic Disbondment
Cathodic disbondment is the loss of adhesion between the coating and metal substrate caused by the cathodic protection system. There are a variety of causes of cathodic disbondment of a coating system, including the environment to which the pipe is exposed, and the level of impressed current on the system.
Disbondment - Corrosionpedia
2024年7月19日 · Disbondment is a type of corrosion protection involving metals in which a loss of adherence between metal substrates and cathodic coating occur due to a reduction reaction in the coating’s interface. Typically, systems for cathodic protection are installed to …
Overview of disbonding technologies for adhesive bonded joints
2016年11月8日 · This paper considers the motivation for disbonding, the requirements and considerations associated with possible methods, and the overall effectiveness of the various mechanisms in the context of non-structural, semi-structural and structural joints.
•Cathodic disbonding depends on transport of some reactants through the coating film. •Thicker film slows the permeation of reactive species and the cathodic disbondment rate. •The DFT of the test specimen should be clearly recorded in the test report.
Standard Test Methods for Cathodic Disbonding of Coated Steel
2024年2月21日 · 1.1 These test methods apply to procedures for determining the degree of disbondment of a coating from a steel substrate when placed in contact with an electrolyte and a potential is applied to the steel. Specimens may include coated steel …
practice of using ASTM G8, Standard Test Methods for Cathodic Disbonding of Pipeline Coatings (G8). This testing was performed in 2017, and results from this research led to further work using TM0115 to explore the impacts of specimen geometry and …
Cathodic Disbondment Testing | Element
Cathodic disbondment is the breakdown of adhesion between a coating and the coated substrate to which it is applied, caused by cathodic reaction products being formed at defects (holidays) in the coating film as the cathodic protection current passes into the substrate at the defective area.
Cathodic disbonding of epoxy coatings - Effect of test parameters
2008年1月1日 · This paper presents a review of published literature on the effect of various parameters on cathodic disbonding, and results from a study on the effect of oxygen concentration, dry film thickness...