As a reminder, the incident consisted of a leakage of potassium hydroxide solution (“KOH”) (1) from the electrolyzer. The equipment shut down before automatically went into safety mode in accordance with the integrated safety system, the proper functioning of which was confirmed by the investigation report.

Investigations were conducted by Gexcon, an independent safety expert, who carried out an in-depth analysis to determine the sequence of events, the root causes of the incident and the remedial action plan.

Based on the technical information gathered and extensive laboratory experiments on collected samples, Gexcon concluded that a formation of deposits had gradually restricted the flow in the channels of the stack. This led to a series of internal events within the stack that triggered a KOH leakage.

McPhy will bring EnergieDienst’s equipment back into service according to the schedule defined in coordination with the customer.
Based on the investigations carried out, McPhy has proactively initiated an inspection campaign on the few customer sites equipped with a similar model of electrolyzer.

At the same time, the Group is implementing reinforced quality process, inspection and maintenance procedures to provide its customers with the highest quality of technology and services.

Footnote

(1) Electrolytic fluid: consisting of demineralized water with a 30% concentration of potassium hydroxide (“KOH”)

Next financial events

• 2021 Full-Year Sales, on January 25, 2022 (after market)