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Metal / Deposits – Discoloration/Loss of color in colored plasma layers

Type of Surface Change

Origin & Causes        

Surface reaction from cleaning solutions to which hydrogen peroxide has been added, and/or wash solutions, for example those with high alkalinity at pH > 10, combined with temperatures of above 70 °C. This affects black titanium aluminum nitride (TiAlN) and titanium aluminum carbonitride (TiAlCN) layers as well as originally goldish-yellow zirconium nitride (ZrN) and titanium nitride (TiN), titanium aluminum nitride (TiAlN) and titan aluminum carbonitride (TiAlCN) layers as well as originally goldish-yellow zirconium nitride (ZrN) and titanium nitride (TiN) coated products/components.

Treatment Recommendations        

As a result of repair, recoat.

Preventive Measures        

Use only neutral or mild-alkaline cleaner. Do not exceed a temperature of 70 °C when using alkaline cleaners.

Risk Assessment        

Reduced wearing properties and increased reflection.

Note: Because of the extremely strong cleaning effect of such special cleaning programs the friction surfaces of metal instruments must be oiled following each step of cleaning. Otherwise there is a high risk of "metal pitting" or friction corrosion.