Chrome Oxide Ceramic Coating for Sleeves and Bushings

Application fields:

Pump sleeves and wear rings, shaft sleeves and protection sleeves, mechanical seal faces and seats, guide bushings, plunger sleeves, and valves and seats handling abrasive media.

Technical principles and processes:

Chrome oxide (Cr2O3) powder is sprayed by atmospheric plasma spray onto a grit blasted, pre-machined substrate. Because the coating is a hard ceramic, it is finish ground with diamond tooling and lapped to the final size and surface finish. Thickness is checked at several points and porosity is controlled.

Coating performance:

Micro-hardness 1000-1300 HV, harder than hardened chrome plating
Coating thickness 0.10-0.35 mm, ground to tolerance
Low friction and good sealing against shafts and seals
Stable against mild acids, alkalis and many process chemicals
Surface finish down to Ra 0.2 where sealing requires it

轴套与衬套氧化铬陶瓷涂层：用于泵套、轴保护套、密封环等，硬度高、摩擦系数低，兼具耐磨与耐蚀，磨削后可达 Ra0.2 密封面要求。

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