產品詳情
美國進口TAFA鎳基電弧噴涂絲TAFALOY 45CT絲材
陜西西安駿焊銷售美國進口TAFA鎳基電弧噴涂絲
A high chromium content nickel alloy, Tafaloy 45CT, was developed to combat corrosion in high temperature sulfurous environments. The alloy is applied by arc thermal spraying at thicknesses of 15-20 x 10{sup -3} in (381-508 {mu}m) onto surfaces such as water wall tubes in black liquor recovery boilers. The coating has a bond strength of 6500 lbf in{sup -2} (44.82 MPa) and is well matched to the thermal expansion characteristics of steels used for boiler tube construction. Analysis of the coating indicates the presence of two solid solutions of chromium in nickel and two chromium oxides. The major component of the bllic phases is the high chromium (44%) bulk material. The other components are a small portion of the coating. Coatings in service for 18 months show surface sulfur concentrations amounting to only 1%. The sulfur is effectively blocked from more penetration by combining with the chromium and the bation of a self healing chromium oxide film on the coating's surface and within the pores with access to the atmosphere. The coating remains well bonded and protective. Coatings have been in service for over four years without failing. (orig.).
Authors:
Publication Date:Dec 01, 1989
Product Type:Conference
Report Number:CONF-890468-
Reference Number:CHF-90-0F0078; EDB-90-060512
Resource Relation:Journal Name: Surface and Coatings Technology; (Switzerland); Journal Volume: 39/40:1-3,pt.1; Conference: 16. international conference on bllurgical coatings and equipment exhibit, San Diego, CA (USA), 17-21 Apr 1989
Subject:36 MATERIALS SCIENCE; CHROMIUM ALLOYS; CORROSION PROTECTION; PROTECTIVE COATINGS; NICKEL BASE ALLOYS; TITANIUM ADDITIONS; ADHESION; BOILERS; CHEMICAL COMPOSITION; CHROMIUM; CHROMIUM OXIDES; HIGH TEMPERATURE; IN-SERVICE INSPECTION; MICROSTRUCTURE; NICKEL ALLOYS; PLASMA ARC SPRAYING; SOLID SOLUTIONS; SPRAYED COATINGS; SURFACE COATING; THERMAL EXPANSION; TUBES; WATER; X-RAY DIFFRACTION; X-RAY EMISSION ANALYSIS; ALLOYS; CHALCOGENIDES; CHEMICAL ANALYSIS; CHROMIUM COMPOUNDS; COATINGS; COHERENT SCATTERING; CRYSTAL STRUCTURE; DEPOSITION; DIFFRACTION; DISPERSIONS; ELEMENTS; EXPANSION; HYDROGEN COMPOUNDS; INSPECTION; METALS; MIXTURES; NONDESTRUCTIVE ANALYSIS; OXIDES; OXYGEN COMPOUNDS; SCATTERING; SOLUTIONS; SPRAY COATING; TITANIUM ALLOYS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; 360105* - Metals & Alloys- Corrosion & Erosion; 360101 - Metals & Alloys- Preparation & Fabrication
OSTI ID:7198597
Country of Origin:Switzerland
Language:English
Other Identifying Numbers:Journal ID: ISSN 0257-8972; CODEN: SCTEE
Submitting Site:HEDB
Size:Pages: 65-69
Announcement Date:May 01, 1990
