NDLI: The Damage of a Plunger Operating in Carbamide Environment

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Zaha´lka, Frantisˇek Houdkova´, Sˇa´rka Kasˇparova´, Michaela
Copyright Year	2009
Abstract	The surface of plungers, operating in demanding conditions, is exposed to the effects of pumped media, which may be chemically aggressive, in combination with mechanical wear caused by the interaction between the plunger, the counterpart and possibly the solid particles included in the pumped media. To increase of plunger’s lifetime, their surfaces can be protected by different technologies of a surface treatment. One of them is the progressive technology of thermal spraying. A wide range of sprayed materials is one of the reasons for using these versatile coatings as the protection against corrosion, wear or high temperature exposition in order to increase the parts lifetime, reliability and safety. In this case, the TAFA Praxair JP-5000 spraying equipment was used for the creation of the WC-based hardmetal coating on the plungers operating in carbamide environment. Even though the spraying process and the check sample were without any sign of defects the plungers showed a critical damage after several hours of running. The damage mechanism, its possible causes and the proposed solution are discussed in this paper.
Sponsorship	Pressure Vessels and Piping
Starting Page	705
Ending Page	711
Page Count	7
File Format	PDF
ISBN	9780791843666
DOI	10.1115/PVP2009-77303
e-ISBN	9780791838549
Volume Number	Volume 3: Design and Analysis
Conference Proceedings	ASME 2009 Pressure Vessels and Piping Conference
Language	English
Publisher Date	2009-07-26
Publisher Place	Prague, Czech Republic
Access Restriction	Subscribed
Subject Keyword	Industrial spraying equipment Spraying (coating processes) High temperature Coatings Surface finishing Corrosion Wear Particulate matter Safety Damage Plasma spraying Reliability Metal spraying
Content Type	Text
Resource Type	Article

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