Agar-based gel-electrolytes for corrosion diagnostic

• Applicant: Privatdozent Dr.-Ing. Andreas Heyn
• Subject Area: Coating and Surface Technology
• Term: from 2017 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 330472124

• Final Report Year: 2024

Final Report Abstract

The properties of agar-based gel electrolytes make them particularly interesting as electrolytes for corrosion diagnostics. The pore network of the gel determines most of the properties, such as the thickness of the electrolyte film on the surface, the good stability and transparency of the gels and the overall mass transport in the gel. Applications have been found in minimally invasive and short-term corrosion diagnostics. On the one hand, the concept of visualizing localized corrosion spots through the gel electrolyte to make them easier to handle and evaluate. This enables efficient testing of stainless steels or certain pre-treatments. Electrochemical instrumentation could be used for other applications that are also based on minimally invasive functionality. One example is the determination of the protective properties of galvanized steel based on surface layers formed in the atmosphere. It is satisfying that the results of the project have already helped to transfer two of these applications to the standardization phase. Another possible application of gel electrolytes is the simulation of special corrosion conditions, e.g. as an alternative to liquid electrolytes in the investigation of implant materials. The difference between liquid and gel-type electrolytes was demonstrated here for the first time and showed that the corrosion phenomena are much closer to real phenomena.

Publications

• Corrosion investigations by using gel-type electrolytes, 18th Chemnitz Seminar on Materials Engineering – 18. Werkstofftechnisches Kolloquium IOP Publishing, IOP Conf. Series: Materials Science and Engineering 118 (2016), p. 17.
  M. Babutzka & A. Heyn
  
• Korrosionsuntersuchungen mit gelartigen Elektrolyten an natürlich gebildeten Zinkdeckschichten, 2016, Conference: Tagung Werkstoffprüfung 2016, At: Neu-Ulm
  M. Babutzka, A. Burkert & A. Heyn
  
• Dynamic tafel factor adaption for the evaluation of instantaneous corrosion rates on zinc by using gel-type electrolytes. IOP Conference Series: Materials Science and Engineering, 181, 012021.
  Babutzka, M. & Heyn, A.
  
• Korrosionsuntersuchungen mit gelartigen Elektrolyten zur Beschreibung der Korrosionsschutzwirkung von Zinküberzügen, 16. Sommerkurs Werkstoffe und Fügen, 2017, pp. 119-127.
  M. Babutzka, A. Burkert & A. Heyn
  
• Korrosionsuntersuchungen mit gelartigen Elektrolyten zur Beschreibung der Korrosionsschutzwirkung von Zinküberzügen, 2017, Conference: 16. Sommerkurs Werkstoffe und Fügen, Magdeburg
  M. Babutzka, A. Burkert & A. Heyn
  
• Korrosionsuntersuchungen mit gelartigen Elektrolyten zur Beschreibung der Korrosionsschutzwirkung von Zinküberzügen, 2017, Conference: 16. Tagung "Korrosionsschutz in der maritimen Technik", Hamburg
  M. Babutzka, A. Burkert & A. Heyn
  
• Agar-based Gels as an Electrolyte for Corrosion Diagnostics, Poster, EFC Eurocorr.
  A. Heyn
  
• Agar-based gels as an electrolyte for corrosion diagnostics, Presentation at EMCR 2018 (Cambridge/UK).
  A. Heyn
  
• Corrosion investigations on zinc coatings by using geltype electrolytes, 2018, Conference: Intergalva 2018
  M. Babutzka, A. Burkert & A. Heyn
  
• Cutting the Cost of Corrosion, 2018, Scientia 121 (Engineering and Tech, Physical Science).
  A. Heyn
  
• Influence of austenitizing and tempering on the corrosion behavior and sensitization of martensitic stainless steel X50CrMoV15. Materials and Corrosion, 69(10), 1338-1349.
  Babutzka, Martin; Heyn, Andreas & Rosemann, Paul
  
• Detection of sensitisation on aged lean duplex stainless steel with different electrochemical methods. Electrochimica Acta, 317, 17-24.
  Kauss, Norman; Heyn, Andreas; Halle, Thorsten & Rosemann, Paul
  
• KorroPad-Prüfung - Anwendungen aus Industrie und Forschung, 2019, Conference: 3-Länder-Korrosionstagung - Korrosion ist kein Zufall - Neue Messmethoden, Analytik und Simulation, At: Frankfurt
  P. Rosemann, N. Kauss & A. Heyn
  
• Korrosionsuntersuchungen mit gelartigen Elektrolyten an Zink - Eine innovative Prüfmethodik, 2019, Conference: GfKORR-Jahrestagung 2019, At: Frankfurt, a. M., Germany
  M. Babutzka, A. Burkert, S. Valet & A. Heyn
  
• Agar-based gels as an electrolyte for corrosion diagnostics, Conference: Eurocorr.
  A. Heyn
  
• Comparison of liquid and gel electrolytes for the investigation of pitting corrosion on stainless steels. IOP Conference Series: Materials Science and Engineering, 882(1), 012010.
  Heyn, A.
  
• KorroPad testing - applications from industry and research. IOP Conference Series: Materials Science and Engineering, 882(1), 012017.
  Rosemann, P.; Kauss, N. & Heyn, A.
  
• KorroPad-Prüfung - Anwendungen aus Industrie und Forschung, 2020, Conference: Symposium on Materials and Joining Technology.
  Paul Rosemann, Norman Kauss, Oliver Michael, Sebastian Hütter, Paul Heidenreich, Markus Schumacher & Andreas Heyn
  
• Korrosionsdiagnostik mit Gel-Elektrolyten, Dezember 2020, In Buch: Jahrbuch Oberflächentechnik 2020, Band 76, Publisher: Eugen G. Leuze Verlag KG
  A. Heyn
  
• Quantitative evaluation of global and local chromium contents with the EPR test on ferritic and martensitic stainless steels. IOP Conference Series: Materials Science and Engineering, 882(1), 012009.
  Heyn, A. & Rosemann, P.
  
• Agar-Gele als Elektrolyt für die Korrosionsdiagnostik - Eigenschaften und Besonderheiten, Conference: Forschungsseminar des MDZWP.
  A. Heyn
  
• Application limits and sensitisation behaviour of the manganese‐ and nitrogen‐alloyed austenitic stainless steel P2000 (X13CrMnMoN18‐14‐3). Materials and Corrosion, 72(10), 1656-1667.
  Kauss, Norman; Heyn, Andreas; Michael, Oliver; Schymura, Michael & Rosemann, Paul
  
• What a difference a gel makes (as an electrolyte for corrosion studies), Conference: Eurocorr.
  A. Heyn