Session: 18-02 Service of Gas Turbine Components - Life Assessment & Repair Processes

Paper Number: 80448

80448 - Hexavalent Chromium Observations on Serviced Components of Oil&Gas Gas Turbines: Formation Mechanism Study 

Hexavalent Chromium Cr(VI) is one of the valence states (+6) of chromium. It is a recognised toxin and carcinogen, which if ingested or inhaled may affect the respiratory system, kidneys, and liver. It can also cause dermatitis and severe irritation to the eyes. It is widely used in electroplating, anodizing and dye production industries, but has recently been identified on serviced components of gas turbines. To this regard, there is the potential for Cr (VI) to be present on Gas Turbine components serviced at high temperature, if calcium-containing insulating or anti-seize products are used.

A systematic experimental campaign was carried out to investigate the mechanism and understand the influence of various factors on the formation of substances containing Chromium in the hexavalent form. During the test campaign, anti-seizing products, insulating products but also environmental contaminants were tested on different bare materials in different service conditions.

The final scope of the research activity is the definition of best practices regarding the use of anti-seizing and insulating products for limiting the formation of dangerous substances. At the same time the investigation aimed at increasing the knowledge and the consciousness on the Cr (VI) formation and better managing the risk associated with the presence of Cr (VI) containing contaminants on serviced equipment.

Presenting Author: Erica Scrinzi Baker Hughes

Presenting Author Biography: Erica Scrinzi is a Materials Engineer of Materials & Processes Department (MPE) in Nuovo Pignone - Baker Hughes, Turbomachinery & Processes Solution business. Her main activities are focused on research and development of new materials and coatings for high temperature applications. She is responsible for Health, Safe and Environment (HSE) of MPE department. She holds a Master Degree in Materials Engineering and a PhD in Materials Science & Engineering from University of Trento.

Authors:

Erica Scrinzi Baker Hughes
Gianni Mochi Baker Hughes
Antonio Melani Baker Hughes
Eugenio Del Puglia Baker Hughes
Alice Pranzetti Baker Hughes