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Disbond

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Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-11023
... Effect of Soil and Disbondment Configuration on CP Penetration into Coating Disbondment Li Yan, Jean-Philippe Gravel, Muhammad Arafin CanmetMATERIALS, Natural Resources Canada 3303 33 Street NW Calgary, Alberta, T2L 2A7 Canada ABSTRACT Tests were performed to investigate the effect of soil...
Images
Example of the Charpy V-notch specimens used for mechanical <span class="search-highlight">disbond</span> tests. ...
Published: 01 February 1991
Figure 1 Example of the Charpy V-notch specimens used for mechanical disbond tests. Arrow indicates the interface between the CRA clad and carbon-steel base metal. More
Images
Images
Fracture surfaces of mechanical-<span class="search-highlight">disbond</span> specimens: (a) weld-clad—no cracks ...
Published: 01 February 1991
Figure 3 Fracture surfaces of mechanical-disbond specimens: (a) weld-clad—no cracks were observed, arrows indicate clad/steel interface; (b) HIP-clad—arrows indicate some disbond at the clad/steel interface. More
Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16219
...) coatings. High performance powder coating (HPPC) have about 60% less disbondment compared with FBE, especially in acidic solutions at room temperature. A pH-controlled CD test was also developed to evaluate HPPC and FBE coating performance in electrolytes with pH ranging from 0 to 12. As revealed...
Proceedings Papers

Paper presented at the CORROSION 2021, April 19–30, 2021
Paper Number: NACE-2021-16808
... Abstract It has been hypothesized that fusion bonded epoxy (FBE) could be partially permeable to cathodic protection (CP, producing an imbalance between cathodic and anodic reactions and inducing a high pH environment within disbonded areas that would impede corrosion. However, this hypothesis...
Proceedings Papers

Paper presented at the Offshore Technology Conference Asia, November 2–6, 2020
Paper Number: OTC-30214-MS
.... There were concerns that the dis-bonded FBE flakes would block the wells during operation causing a reduction in the water injection performance. The objective of this qualitative root cause analysis is to determine the likelihood of further internal FBE coating disbondment during operation and assess...
Proceedings Papers

Paper presented at the CORROSION 2020, June 14–18, 2020
Paper Number: NACE-2020-14314
...ABSTRACT ABSTRACT The cathodic disbondment susceptibility of coated offshore grade pipeline steel samples with a single holiday or a cut-back edge was investigated. Several accelerated conditions were used, including elevated temperature of 60°C or mechanical stress in the form of an elastic...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-13367
..., cathodic protection may result in damage to the protective coating. Cathodic disbondment testing evaluates a coating’s resistance to disbondment in the presence of cathodic protection. Researchers previously compared cathodic disbondment test methods NACE (1) TM0115 and ASTM (2) G8, showing that cathodic...
Proceedings Papers

Paper presented at the CORROSION 2019, March 24–28, 2019
Paper Number: NACE-2019-12823
... of experimental and commercial benchmarks will be compared, including pot life, Konig hardness, low temperature curing performance, dry time, and cathodic disbondment (CD) at elevated temperatures. CD test results at dry film thickness (DFT) above 30 mils (750 microns) and less than 20 mils (500 microns) are also...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-10914
... on the coating itself if not properly applied. Cathodic disbondment testing is used to measure a coating’s susceptibility to loss of adhesion to the substrate due to cathodic polarization. NACE recently published a new cathodic disbondment test method, TM0115-2015, Cathodic Disbondment Test for Coated Steel...
Proceedings Papers

Paper presented at the CORROSION 2018, April 15–19, 2018
Paper Number: NACE-2018-11018
... ABSTRACT Protective coatings are often used with cathodic protection to protect steel structures in buried or submerged services. Cathodic disbondment resistance is always on the top of the coating property list required by end users. Many standard test methods for cathodic disbondment...
Proceedings Papers

Paper presented at the CORROSION 2017, March 26–30, 2017
Paper Number: NACE-2017-9146
... Penetration of Cathodic Protection into Pipeline Coating Disbondment Li Yan CanmetMATERIALS Natural Resources Canada 3303 33 Street NW Calgary, Alberta, T2L 2A7 Canada Muhammad Arafin CanmetMATERIALS Natural Resources Canada 3303 33 Street NW Calgary, Alberta, T2L 2A7 Canada Jean-Philippe Gravel...
Proceedings Papers

Paper presented at the CORROSION 2017, March 26–30, 2017
Paper Number: NACE-2017-9469
... formed at disbonded coating regions around coating breaks. To examine the possible amount of this effect, distress in the form of controlled surface breaks was created on production samples of ECR, some of which were further subject to cathodic disbondment to create surrounding disbonded regions around...
Proceedings Papers

Paper presented at the CORROSION 2016, March 6–10, 2016
Paper Number: NACE-2016-7024
... with wellhead temperatures 110°C and above, high temperature (HT) FBEs have been used. The performance of these newly formulated HT-FBEs in terms of maintaining adequate adhesion during long term storage and resistance to FBE disbondment before installation is not well understood. The international codes...
Proceedings Papers

Paper presented at the CORROSION 2015, March 15–19, 2015
Paper Number: NACE-2015-5845
... Abstract This paper presents new experimental evidences on the capability of a novel electrochemical corrosion monitoring sensor, which was recently conceived, for measuring localized corrosion under disbonded pipeline coatings. The sensor’s design includes an artificial crevice...
Proceedings Papers

Paper presented at the CORROSION 2014, March 9–13, 2014
Paper Number: NACE-2014-3927
... ABSTRACT An epoxy coating with excellent cathodic disbondment resistance performance is developed in this paper. Bisphenol A epoxy resin, bisphenol F epoxy resin, novolac epoxy resin and C9 petroleum resin were used as the resin system of coating. The orthogonal test of four factors at four...
Proceedings Papers

Paper presented at the CORROSION 2013, March 17–21, 2013
Paper Number: NACE-2013-2609
... ABSTRACT One of the key characteristics for protective coatings is resistance to cathodic disbondment(CD). A series of testing methods have been developed to assess the suitability of coatings used with cathodic protection(CP). However, even following the identical testing method...
Proceedings Papers

Paper presented at the CORROSION 2012, March 11–15, 2012
Paper Number: NACE-2012-1108
... ABSTRACT ABSTRACT Cathodic disbondment testing is used to evaluate the long-term performance of barrier coatings used to protect metal pipe used in underground applications. A multilayered coating system failed this test. Experiments were done to understand the chemistry that led...
Proceedings Papers

Paper presented at the CORROSION 2012, March 11–15, 2012
Paper Number: NACE-2012-1285
... ABSTRACT: The cathodic disbondment (CD) test has been a well known and generally accepted laboratory test for pipeline coatings for a long time. Good test results (low delamination radii) indicate that the coating is expected not to delaminate to a large extent in the presence of cathodic...

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