Introduction of Coating Case Studies for Chemical Plant "Shaft"
We will introduce a case where the lifespan was extended to about three times that before construction, contributing to maintenance-free operation!
In chemical plants, various rotating equipment and compressors are used under harsh conditions for tasks such as liquid transfer, stirring, and concentration, leading to concerns about corrosion and wear resistance. We would like to introduce a case where these issues were resolved through ceramic thermal spraying. ■Challenge The oil seal and mechanical seal areas experienced wear over time, causing the sealing parts to erode and resulting in leaks of the liquid being transferred. ■Proposal We proposed to grind down the worn parts of the shaft and coat those areas with ceramic thermal spray to restore the shaft. ■Effect The lifespan was extended to about three times that of before the work, contributing to maintenance-free operation. The reduced frequency of replacements was also appreciated from a cost perspective.
basic information
【Types of Thermal Spraying by Nippon Coating Industry】 ■ Low-Pressure Plasma Spraying ■ Plasma Spraying ■ High-Velocity Oxygen Fuel Spraying ■ Arc Spraying ■ Thermal Spraying 【Materials for Thermal Spraying】 ■ Rod-Type Spraying Materials ■ Oxide-Based Spraying Materials ■ Carbide-Based Spraying Materials ■ Metal and Alloy Spraying Materials ■ Self-Fusing Alloy Spraying Materials
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Applications/Examples of results
**Achievements** ■ Chemical plants: Shaft, sleeve, plunger, sliding parts of mechanical seals ■ Semiconductors and LCDs: Covering, thermal spraying on quartz, shower plates ■ Steel and metals: Wire drawing machine parts, flingers, rolling shafts ■ Films: SCR, RA, WC, OAT ■ Automotive: Piston head, hardened coils ■ Beverages: Filler machine parts, guide
