Materials Performance Supplements


Materials Performance is the world's most widely circulated magazine dedicated to corrosion prevention and control. MP provides information about the latest corrosion control technologies and practical applications for every industry and environment.

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formula weight) and adding the VCI (at 3% by total formula weight). This is illustrated in Table 2 with the positive performing syn- ergies highlighted. These synergies allow for reduced usage of inhibitors that may have to meet stricter environmental limits while possibly providing cost savings as well. Combinations of B2 with various tra- ditional inhibitors seemed to consistently provide comparable results, while the use of the VCI only provided the best results in this system. Conclusions Custom ers are b ecoming more and more demanding and are expecting their coatings to last longer. With the ongoing performance and environmental challenges in the coatings industry, there continues to be a need for new technologies that can provide better performance. Stricter regulations limiting the use of certain products continues to make this more difficult as formulators are having to find alternatives to the products that have been used for many years. This article shows, through research, that the use of VCIs can match or improve the corrosion resistance of coatings either used by themselves or in combination with existing inhibitor tech- nologies, thus reducing the environmental concerns without sacrificing performance. Acknowledgments This material is based upon work and research done by Rick Shannon & Alex Hart, Cortec Corporation. References 1. Y.I. Kuznetsov, et al., "Inhibiting Action and Absorption of Beta-Aminoketones on Metals," Zasshchita Metallov 32, 5 (1996): pp. 528-533. 2. S. Gangopadhyay, P. Mahanwar, "Recent De- velopments in the Volatile Corrosion Inhibi- tor (VCI) Coatings for Metal: A Review " (Washington, DC: American Coatings Associ- ation, 2018). 3. ASTM B117-16, "Standard Practice for Oper- ating Salt Spray (Fog) Apparatus" (West Con- shohocken, PA: ASTM International, 2010). 4. B.A. Miksic, "Use of Vapor Phase Inhibitors for Corrosion Protection of Metal Products," CORROSION/83, paper no. 308 (Houston, TX: NACE International, 1983). This article is based on CORROSION 2019 paper no. 13079, presented in Nashville, Ten- nessee, USA. MARKUS BIEBER is the director of sales— High Performance Coatings & Additives at Cortec Corp., St. Paul, Minnesota, USA, email: He has spent more than 20 years in product and sales management in the coatings indus- try, with a focus on providing customers with value-added coating solutions. He is a member of NACE International. FIGURE 2 VCIs A and B only, 30 days = 720 h. TABLE 2 Combination Results Hours Combo Hours Standard Result Hours Combo Hours Standard Result 480 A+A2 480 A worse 480 A1+A2 480 A1 worse 480 A+B2 480 A worse 480 A1+B2 480 A1 same 480 A+C2 480 A worse 480 A1+C2 480 A1 worse 480 A+D2 480 A worse 480 A1+D2 480 A1 worse 480 B+A2 480 B worse 480 B1+A2 480 B1 same 480 B+B2 480 B same 480 B1+B2 480 B1 same 480 B+C2 480 B worse 480 B1+C2 480 B1 same 480 B+D2 480 B worse 480 B1+D2 480 B1 worse 480 C+A2 480 C worse 480 C1+A2 480 C1 worse 480 C+B2 480 C worse 480 C1+B2 480 C1 same 480 C+C2 480 C worse 480 C1+C2 480 C1 worse 480 C+D2 480 C worse 480 C1+D2 480 C1 worse 480 D+A2 480 D worse 480 D1+A2 480 D1 worse 480 D+B2 480 D same 480 D1+B2 480 D1 same 480 D+C2 480 D worse 480 D1+C2 480 D1 worse 480 D+D2 480 D worse 480 D1+D2 480 D1 worse 720 VCI A better 720 VCI B better Notes: A, B, C, and D are traditional inhibitors; A1, B1, C1, and D1 are traditional inhibitors; VCI A and VCI B are VCIs. The positive performing synergies are highlighted. The Use of VCIs in Conjunction with or Replacement of Traditional Corrosion Inhibitors 5 CORTEC SUPPLEMENT TO MP MATERIALS PERFORMANCE JUNE 2019

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