April 2021 Vol. 5

PCN – Communicating News In Protective Coatings Globally in Real-Time

Leading Source of Industry News on Protective Coatings for Oil & Gas, Pipelines, Marine and Construction

NEWSMAKERS:  * Akzo Nobel * Carboline  * CHUGOKU * ExcelPlas * Failure Analysis * Hempel * Jotun * Nippon Paint * PCN  * PCS * PPG * Protective Coatings


Dutch Coatings Maker Akzo Nobel Announces First-quarter Core Profit Jumped 43% to 307 Million Euros ($369.2 million)

New Digital News Platform for Reaching the Entire Global Protective Coatings Industry in Real Time

AkzoNobel Publishes 1Q 2021 Results and Reports 16% Growth

Hempel Launches New Video on their Protective Coatings Protecting the World’s Infrastructure and Assets

Hempel Showcase a New Generation of Protective Coatings for Railcars [PDF]

Epoxy Coatings Only Provide Temporary Solutions which Require Continuous Inspection and Periodic Maintenance within 3-8-year Windows

Akzo Nobel Seeks Start-ups for Paint-the-Future Competition

Chugoku Marine Paints Expands its Portfolio of Sea Premier™ Antifouling Coatings

Nippon Paint Marine Receives the 2021 GREEN4SEA Technology Award

More Attention Needed To Prevent Barnacle Fouling In Ship Niche Areas Using Surface Coatings

Ship Corrosion Case Study: Factors for Preserving & Coating Ships Hulls

PPG Report “Record” First Quarter Net Sales of USD$3.9 billion, 15% Higher Than Prior Year (Breaking News)

Carboline Hiring Technical Sales Representative for Protective Coatings





15 of the Most Common Causes of Failure of Protective Coatings & the Type of Failure (from ExcelPlas 25 Years of Experience)

  1. Inadequate blasting and insufficient removal of mill scale from the steel leading to poor adhesion
  2. Use of blasting grit with soluble salt contamination leading to osmotic blistering and under film corrosion
  3. Oil contaminated compressed air used for blasting leading to surface contamination leading to poor adhesion and delamination of the coating
  4. Inadequate blast profile i.e. shallow valleys leading to poor adhesion
  5. Excessive blast profile i.e. high peaks leading to poor steel coverage and risk of rust-rash corrosion, particularly for low DFT coatings.
  6. Excessive delay between blasting and coating causing flash corrosion contamination leading to poor adhesion and corrosion cells
  7. Addition of too much thinner that increases the potential for porosity and pinholes in the coating. There is also an increased propensity for the formation of Bernard Cells where there are boundaries of resin rich coating, resulting in “crow’s feet” cracking.
  8. Poor mix ratio of the epoxy with the hardener leading to incomplete cure
  9. Inadequate mixing/stirring of the coating before application leading to poor distribution of barrier pigments leading to coating cracks and premature corrosion
  10. Inadequate coating specification: lack of suitable topcoat for UV sensitive epoxies leading to chalking and UV breakdown
  11. Inadequate curing of coatings leading to less than optimal properties of the coating with increased moisture penetration and formation of corrosion cells
  12. Incompatibility of coating if different paint systems are used multicoat application leading to delamination/peeling
  13. Poor QA leading to inadequate control of coating thickness (e.g. excessive DFT) leading to cracking of the coating due to residual stresses
  14. Poor QA leading to inadequate control of coating thickness: low coating thickness or missing coats can lead to poor barrier performance and premature corrosion
  15. Exceeding the recoat window leading to delamination of topcoat from primer coat due to blast-dust contamination or lack of interfacial adhesion.


This newsletter is brought to you by ExcelPlas Coating Labs (http://www.excelplas.com/)

ExcelPlas Labs provides independent testing, analysis and investigation on protective coatings to prevent corrosion.

ExcelPlas has extensive analytical capabilities for testing of Protective Coatings and Insulation Consulting for major oil and gas companies.

We conduct corrosion surveys, coating sampling, coating analysis and testing to ensure coating specifications for a wide range of onshore and offshore clients in Australia and the Asia-Pacific Region.

ExcelPlas Labs offer a full range of coating testing and analytical services to Australia’s mining, oil, gas and infrastructure sectors.

Forensic analysis for undertaking various coating based failure investigations and problem solving.

ExcelPlas Undertakes Analysis & Testing of Polymer Coating Systems including:
• Epoxy Protective Coatings
• Epoxy-Phenolic Protective Coatings
• Fusion bonded epoxy (FBE) 
• Dual-Layer Fusion bonded epoxy (DLFBE)
• Liquid applied epoxy (LAE)
• Abrasion resistant overcoat (ARO)
• Three-layer PE (3LPE)
• Multi-component liquid spray  (MCL)
• Heat shrink sleeves (HSS)

Testing on Coatings that ExcelPlas can Undertake includes:
• Coating identification by Infra-red Analysis (FTIR)
• Degree of Cure by Thermal Analysis (DSC)
• Coating Filler Identification by X-ray Analysis (EDS/XRD)
• Coating Microstructure by Embedding, Polishing and Optical Microscopy (OM)
• Coating Thermal Stability and Composition by Thermogravimetric Analysis (TGA)

DSC – Phase transition/volatiles / Tg / degree of cure/characterisation
TGA – Volatile compounds, inorganic mass % mix ratio
Element mapping for chlorides on paint flakes
Microscopy -Count layers and thickness of layers
-Assess porosity and voids
-Check distribution and orientation of filler particles

Condition monitoring and analysis of corrosion prevention coatings (epoxies, epoxy-phenolics)

Testing of Epoxy Coatings (LAE, FJC, FBE), heat shrink sleeves and tapes, barrier tapes and meshes.

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