CV of Benjamin T. A. Chang, PhD, PE


10400 Westoffice Dr. Ste 107, Houston, Tx 77042, 713-783-7659(O),


2005 – Present, President, PolyLab, LLC, Houston, Texas, USA

3rd Party Coating Test Lab, 3rd Party Legal Coating Expert Witness

A polymer researcher with over 40 years of experience in R/D of protective coating, epoxy, composite, elastomer and thermoplastics and is a NACE certified Coating Inspector, NACE and SSPC certified Protective Coating Specialist, NACE CIP Instructor, Texas licensed Professional Engineer, NACE Fellow


  1. Research Project Investigator of the US DOT funded research project on “External Pipeline Coating Integrity” to investigate the 3L Polyolefin coating disbondment mechanism due to residual stress and surface preparation, 3LPP cracking, Wet adhesion, High Temperature Cathodic Disbondment, High Temperature Pipeline Coating Qualification, Project #DTPH56-06-T-000022, Project Manager- James Merritt.2. Prepare high temperature external pipeline coating specifications -3LPP and FBE for Fluor Engineering.
  2. Conducted Failure Analyses of 3LPP pipeline coatings for Abu Dhabi Company for Onshore Oil Operations (ADCO)
  3. Prepared the new NACE SP-0108 standard on “Corrosion Protection of Offshore Platforms by Protective Coatings”.
  4. Prepared Technical specification for Shell water flood ID pipeline coating.
  5. Prepared Dow Corning-China Chemical Plant Protective Coating Selection
  6. Teach “3LPO Pipeline Coating Workshop” in China.
  7. Teach NACE CIP courses in China, Taiwan

1980 – 2005, Technical Staff, Shell Global Solutions (US) / Shell International E/P, Shell Development Co., Westhollow Technology Center, Houston, Tx
Material selection, Coating specification preparation, Failure analysis, Innovative research
Offshore Platform Protective Coatings
Prepared four new NACE TM0104, TM0204, TM0304, TM0404 standard test methods for atmosphere and splash zone, ballast water tank, exterior submerged maintenance and new construction coatings.
Prepared Specification for jacketed SS 316 instrument tubing to prevent pitting corrosion.
Prepared Specification for long life polychloroprene riser splash zone coatings.
Developed test protocol for downhole tubular ID coatings
Prepared Shell (Schedule P) technical specification for offshore platform coatings
Pipeline Coatings
Developed Shell test protocols for buried pipeline coatings, tapes, and shrink sleeves.
Developed methodology to determine maximum service temperatures for buried pipeline coatings.
Developed Shell test protocol to qualify high temperature subsea pipeline coatings.
Prepared Shell coating specification for high temperature 3LPP subsea pipeline coatings.
Prepared Shell DEP Technical Specification for “bituminous Enamel Coating of Steel Linepipe.
Prepared Shell DEP Technical Specification on Polychloroprene Splashzone Riser Coatings.
Prepared Shell DEP Specification for thermal spray zinc and aluminum coatings.
Prepared Shell DEP Technical Specification on Pipeline Rehabilitation by Liquid Coatings.
Epoxy Composites
Mechanical Testing – Extensive experiences in composite testing-tensile, compression, shear, fatigue, creep, fracture toughness, crashworthiness, residual stress measurement for electronic epoxy encapsulation, acoustic emission testing, fiber-resin interfacial sheer strength.
Failure analysis – Developed techniques in the failure analysis of composite leaf spring, FRP pipe, and Insitupipe.
Epoxy Composite Processing – Worked with filament winding machine, pultrusion machine, reinforced injection molding, prepeg and autoclave, hand lay-up, and compression molds.
Polymeric Materials
Developed structure and property relationship of flexible open-cell foams.
Developed techniques to measure the glass transition temperature of the Carilite wood adhesive cured in plywood.
Developed techniques to characterize the mechanical properties of Cariverse polymer in a tiny quantity (a few grams).
Established a procedure to measure the molecular chain orientation of drawn polymer fibers by X-ray diffraction.
Developed an innovative technology to plug casing and the unwanted casing production zone.


Ph. D. in Materials Science, Univ. of Rochester, Rochester, NY
B.S. in Mechanical Eng. National Taiwan Univ., Taipei, Taiwan

Accreditations / Honors

NACE FellowNACE Certified Coating Inspector #8090
NACE Protective Coating Specialist # 7757
NACE CIP Instructor
SSPC Certified Protective Coating Specialist #1071-976-1451
Texas Licensed Professional Engineer, #95389
NACE 2006 Technical Achievement Award

Professional Membership


Professional Activities In NACE

Chair following NACE Task Group Committees:

  1. TG#260 Offshore Platform Atmospheric and Splash Zone Maintenance Coatings
  2. TG#263 Offshore Platform Ballast Water Tank Coating Systems
  3. TG#264 Exterior Protective Coatings for Seawater Immersion Service
  4. TG#312 Offshore Platform Atmospheric / Splash Zone New Construction Coatings
  5. TG#313 Corrosion Protection of Offshore Platforms by Protective Coatings
  6. TG #470, Critical Review of International Test Standard on Cathodic Disbondment
    Following NACE standards have been published:
    NACE TM0104-2004, Standard Test Method , “Offshore Platform Ballast Water Tank Coating System Evaluation”
    NACE TM0204-2004, Standard Test Method , “Exterior Protective Coatings for Seawater Immersion Service”
    NACE TM0304-2004, Standard Test Method , “Offshore Platform Atmospheric and Splash Zone Maintenance Coating System Evaluation”
    NACE TM0404-2004, Standard Test Method , “Offshore Platform Atmospheric and Splash Zone New Construction Coating System Evaluation”
    NACE SP0108-2008, Standard Practice on “Corrosion Protection of Offshore Platforms by Protective Coatings”.
    NACE TM0115, Standard Test Method, “Cathodic Disbondment Test for Coated Steel Structures under Cathodic Protection”
    Organizer and Chairman for the following NACE Coating Symposia;
    NACE 2003-2021 Oil/Gas Coating Technology Symposium
    NACE 2017, International Pipeline Coating Technology Conference in Houston, TX
    NACE 2019,International Pipeline Coating Technology Conference in Dubai, UAE, Jan 15-17, 2019

ISO Activities

  1. Member of ISO 20340 standard on Offshore Platform Coatings.
  2. Member of ISO 21890-3 Committee on Petroleum and natural gas industries – External coatings for buried or submerged pipelines used in pipeline transportation systems –Part 3: Field Joint Coatings

Patent / Award

“Form Filter Material and Process to Prepare Foam Filter Material” Patent #6,103,645, August 2000 “Downhole Polymer Plug and Liner And Methods Employing Same” US Patent # 6,896,063 May 2005
NACE 2006 Technical Achievement Award
NACE 2019 Fellow

External Publications

#YearPaper Title
12021Wet Abrasive Blast/ Decontamination Chemical for Offshore Maintenance Coatings, AMPP Corrosion 2021, Paper # 16651
22021Offshore Atmospheric Coating Performance Evaluation Test Standards-NACE vs. ISO AMPP Corrosion 2021, Paper #16902
32019Blister Initiation Mechanism of FBE Coatings, NACE Corrosion 2019 ,Paper #13508
42019Impact of Very Low Concentration of Soluble Salts on Coatings Performance, NACE Corrosion 2019, Paper #13218
52018ADVANCEMENT OF CATHODIC DISBONDMENT TEST Method, NACE Corrosion 2018, Paper #11018
62018Evaluation of Offshore Coating Systems on Pitted Stainless Steels,  NACE Corrosion 2018, Paper# 10487
72018Evaluation of Offshore Coating Systems on Pitted Stainless Steels,  NACE Corrosion 2017, Paper# 10487 
82017Accelerated Offshore Coating Performance Testing, NACE Corrosion 2017, Paper #9134
92016Evaluation of Protective Coatings to Mitigate Corrosion under Insulation, NACE Corrosion 2016, Paper # 7804
102014Critical Pre-Qualification Test Protocol for External High Temperature Pipeline Coatings, NACE Corrosion 2014, Paper# 3804
112014Axial Wrinkling Behavior of Heat Shrinkable Sleeves / Tapes in Buried Pipelines,  NACE Corrosion 2014, Paper # 3810
122012Non-Osmotic Blistering Mechanism in FBE Coatings,  NACE Corrosion 2012, Paper # 01298
132012Wrinkling of Heat Shrinkable Sleeves / Tapes in Buried Pipelines, NACE Corrosion 2012, Paper # 01297
162010A New Approach for Determination of Wet Adhesive Strength of Epoxy Coatings on Steel Substrate,  NACE Corrosion 2011, Paper# 10009
172010Failure Analysis of Three Layer Polypropylene Pipeline Coatings, NACE Corrosion 2010, Paper #10002
182011Determination of epoxy coating wet-adhesive strength using a standardized ASTM /ISO scratch test, J Coating Technology Research, 8(2011)255-263
192010Mechanical Modeling of Scratch Behavior of Polymeric Coatings on Hard and Soft Substrates, Tribol Lett 37(2010) 159-167
202008Critical Evaluation of International Cathodic Disbondment test Methods, 17th International Corrosion Congress, Las Vegas, USA
212008Integrity of 3LPE Pipeline Coatings-Residual Stresses and Adhesion Degradation, Proceedings of the 7th International Pipeline Conference, IPC 2008, Calgary, Canada
222007Disbondment Mechanism of 3LPE Pipeline Coatings, BHR Conference, Edinburgh, UK, 2007
232001Selection of Field Applied Liquid Rehabilitation Pipeline Coatings, NACE Corrosion 2001, Paper # 01609

Additional Published Reports

11981Evaluation of polymeric materials for seals in offshore geopressure gas environments.
21981Evaluation of elastomeric materials for through-the-flowline pistons in offshore geopressured sour gas wells
31981Evaluation of KTR ™ seals in offshore geopressure gas environments
41983Evaluation of polymeric materials in sour gas environments
51983Polymeric seal materials for south Texas gas wells shell development company Westhollow research center August 15, 1983
61985The combined effect of time, temperature, moisture and mechanical stress on the failure of inland-made composite leaf springs
71985Creep of the in-situ form pipe material – polyester-felt-filled Epon resin 9215/epon curing agent 9250
81986Failure analysis of FRP springs
91987Effects of additives and morphology on the creep behavior of polybutylene
101988Energy absorption characteristics of circular fiberglass composite tubes – effects of tube wall thickness and tube diameter
111989Fiber-resin interfacial adhesion measurement
121990Energy absorption characteristics of circular fiberglass composite tubes – effect of resin properties
131991Insitupipe at Valdez terminal – Alaska
141991Flexural creep of Insituform liner materials – apparatus
151993Disbonding of polyurethane film from crosslinked epoxy resins and polyester felt used in the Insitupipe/r/
161993Creep rupture life prediction of EPON/r/ resin – polyester felt composites used in the Insituform/r/ process
171993Tensile creep of cured in place pipe materials in simulated field environments – preliminary results
181993The measurement of poly(propylene terephthalate) molecular chain orientation by x-ray diffraction
191994Compressive properties of high internal phase emulsion foams – effect of polymer modulus and foam density
201998Test protocol for Shell offshore platform maintenance coatings: topside and splashzone coatings
211998User-friendly offshore platform coatings
222003Evaluation of TEK-RAP Tapes as Pipeline coating materials
232005Stainless steel air cooler tubes in offshore environments