Effect of Metallic Matrix Composition on the Erosion-Corrosion Behavior of WC-Coatings

1997 ◽  
Author(s):  
T. Rogne ◽  
T. Solem ◽  
J. Berget
Keyword(s):  
Corrosion Resistance ◽  
Metal Matrix ◽  
Metallic Matrix ◽  
Matrix Composition ◽  
Corrosive Media ◽  
Corrosion Resistant ◽  
Erosion Corrosion ◽  
Different Types ◽  
Galvanic Interaction ◽  
Sprayed Coatings

Abstract In corrosive media the wear resistance of ceramic-metallic coatings is dependent on the corrosion resistance of the metal matrix. Other factors that will affect the coating deterioration are the corrosivity of the medium and any galvanic interaction from the surrounding material. This paper presents results from a study where different types of WC(Co/Cr/Mo/Ni) powders have been sprayed by HVOF, Diamond Jet 2600 Hybrid equipment. The properties of the sprayed coatings have been verified by metallographic studies and by erosion-corrosion testing both under corrosive and non-corrosive conditions. The results clearly demonstrate the importance of having a metal matrix at least as corrosion resistance as the surrounding materials. When wear exposed components in pipe systems, pumps or valves are coated with a WC type coating, the corrosion resistance of the metal matrix should be compatible to the material of the rest of the system. This is especially important when the surrounding materials are corrosion resistant alloys as stainless steels, where the coatings otherwise will act as an anode.

UNILOY 50Cr/50Ni

Alloy Digest ◽  
1969 ◽  
Vol 18 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Heat Treating ◽  
Oil Refinery ◽  
Corrosive Media ◽  
Corrosion Resistant ◽  
Temperature Performance ◽  
Pulping Liquors

Abstract UNILOY 50Cr/50Nj is an improved corrosion-resistant, wrought alloy with outstanding resistance to a wide variety of corrosive media. It is recommended for oil refinery heaters, incinerator components, metallurgical heat treating furnace components and reactor vessels for treating pulping liquors. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Cr-2. Producer or source: Universal Cyclops Steel Corporation.

Influence of WC Particle Size and Matrix Composition on the Behavior of WC-Co-Cr Coatings Sprayed by the HVOF Process

1997 ◽  
Author(s):  
J. Berget ◽  
E. Bardal ◽  
T. Rogne
Keyword(s):  
Particle Size ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Chromium Content ◽  
Deposition Efficiency ◽  
Matrix Composition ◽  
Coating Properties ◽  
Hvof Process ◽  
Erosion Corrosion ◽  
The Matrix

Abstract WC-Co-Cr powders with different WC particle size have been sprayed by the HVOF process. At constant spraying conditions the powders give coatings of different quality. The deposition efficiency during spraying of powders containing large WC particles was found to be low compared to powders with finer WC grains. In addition the amounts of porosity and cracks were different. The coatings have been characterised by different methods. Erosion and erosion-corrosion tests showed that the WC particle size also influence the wear resistance of the coatings. Small WC particle size was found to be beneficial. Chemical composition of the matrix was also found to be decisive for the coating properties. An increase of the chromium content improved the erosion-corrosion resistance.

Effects of Powder Composition on the Erosion, Corrosion and Erosion-Corrosion Properties of HVOF Sprayed WC Based Coatings

1998 ◽  
Author(s):  
J. Berget ◽  
E. Bardal ◽  
T. Rogne
Keyword(s):  
Grain Size ◽  
Corrosion Resistance ◽  
Matrix Composition ◽  
Size Distributions ◽  
Corrosion Properties ◽  
Wear And Corrosion ◽  
Erosion Corrosion ◽  
Grain Size Distributions ◽  
Powder Characteristics ◽  
Mo Content

Abstract Different WC-based coatings have been sprayed by the HVOF process and characterised by different methods. The influence of different powder characteristics on the wear and corrosion performance was investigated. Powder characteristics investigated include: i) average WC particle size, ii) matrix composition and iii) powder grain size distribution. The results show that the coating properties are affected by the different powder characteristics. Small WC particles were found to be beneficial as regards the erosion and erosion-corrosion resistance. An increase of the Cr and Mo content increased the corrosion and erosion-corrosion resistance. Powders with narrow grain size distributions gave coatings of higher quality than powders with wider grain size distributions.

scholarly journals Galvanic Corrosion Behaviour of Different Types of Coatings Used in Safety Systems Manufacturing

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1542
Author(s):  
Diana-Petronela Burduhos-Nergis ◽  
Dumitru-Doru Burduhos-Nergis ◽  
Costica Bejinariu
Keyword(s):  
Corrosion Resistance ◽  
Carbon Steel ◽  
Corrosion Behaviour ◽  
Galvanic Corrosion ◽  
Worker Safety ◽  
Corrosion Properties ◽  
Corrosive Media ◽  
Fire Extinguishing ◽  
Different Types ◽  
Corrosive Environments

Worker safety is one of the main aspects to be taken into account in any activity carried out at work. When we talk about the safety of the worker at activities carried out at height, the condition and characteristics of the personal protective equipment against falling from a height are one of the main causes of work accidents resulting in serious injuries or death. Carabiners are the main components of the safety system; their role is to connect the other components of the system or to make the connection between the system and the anchor point. Therefore, to be used safely, the carabiners’ material must have high corrosion resistance in different environments. This paper is part of a complex study that aims to improve the corrosion properties of carbon steel used in the manufacture of carabiners. Previous studies have shown that the corrosion resistance of carbon steel in various corrosive environments has been improved by the deposition of different types of phosphate layers, as well as other subsequently deposited layers. The aim of this paper is to study the galvanic corrosion evaluation between different galvanic couples (duralumin-coated samples, aluminium bronze-coated samples, and carbon steel-coated samples) tested in three different corrosive media. Moreover, the study approaches for the first time the galvanic corrosion of systems that can be formed between the materials used in the manufacture of carabiners. Accordingly, it was observed that, overall, the samples coated with a Zn phosphate layer exhibited the best performance in all the corrosive environments (saltwater and fire extinguishing solution).

scholarly journals Investigation of Mechanical and Anti-Corrosion Properties of Flame Sprayed Coatings

2018 ◽  
Vol 18 (4) ◽  
pp. 42-53
Author(s):  
M. Musztyfaga-Staszuk ◽  
A. Czupryński ◽  
M. Kciuk
Keyword(s):  
Corrosion Resistance ◽  
Industrial Applications ◽  
Operating Conditions ◽  
Coating Properties ◽  
Corrosion Properties ◽  
Accelerated Corrosion ◽  
Corrosion Resistant ◽  
Accelerated Corrosion Tests ◽  
Sprayed Coatings ◽  
Corrosion System

Abstract This article presents the results of an examination of the properties of thermal flame sprayed coatings produced by material in the form of four powders (two polymers: PA11 and PA12 CastoPlast, and two high purity: tin and aluminum) on the substrate of the unalloyed structural steel of S235JR grade. Investigations of coating properties are based on metallography tests (SEM and CLSM), measurement of microhardness (acc. to PN-EN ISO 6507-1:2007), anticorrosive (acc. to PN-EN ISO 9227:2017-06) and bend testing. Results demonstrate properties of flame sprayed coatings that are especially promising in the industrial applications where corrosion-resistant coating properties are required. Consequently, performed experiments show that the highest corrosion resistance is demonstrated by steel samples with a polyamide anti-corrosion system. Accelerated corrosion tests showed the lowest corrosion resistance of the tin coating system, however, they do not fully correspond to the corrosion processes in operating conditions.

Nickel Base Metallic Glass Powders for Application as Plasma Sprayed Coatings

1981 ◽  
Vol 8 ◽  
Author(s):  
V. Panchanathan ◽  
N. Billerica ◽  
C.L. Tsai ◽  
S. Whang
Keyword(s):  
Corrosion Resistance ◽  
Metallic Glass ◽  
Structural Strength ◽  
Corrosive Media ◽  
Metallic Substrates ◽  
Good Corrosion Resistance ◽  
Plasma Sprayed Coatings ◽  
Nickel Base ◽  
Plasma Sprayed ◽  
Sprayed Coatings

ABSTRACTNew nickel rich alloys containing molybdenum and chromium prepared as metallic powders are reported. Using standard plasma spray techniques, these powders (−170 mesh) can be deposited onto metallic substrates as dense, well bonded coatings having predominantly glassy structure. Such coatings exhibit high structural strength, hardness and good corrosion resistance in various corrosive media.

SANICRO 41

Alloy Digest ◽  
1995 ◽  
Vol 44 (1) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Oil And Gas ◽  
High Strength ◽  
Heat Treating ◽  
Gas Production ◽  
Oil And Gas Production ◽  
Corrosion Resistant ◽  
Corrosion Resistant Alloy ◽  
Nickel Base

Abstract SANDVIK SANICRO 41 is a nickel-base corrosion resistant alloy with a composition balanced to resist both oxidizing and reducing environments. A high-strength version (110) is available for oil and gas production. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: Ni-475. Producer or source: Sandvik.

OM-METAL

Alloy Digest ◽  
1974 ◽  
Vol 23 (6) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Water System ◽  
Heat Treating ◽  
Brass Alloy ◽  
Corrosion Resistant

Abstract OM-METAL is a new, corrosion-resistant brass alloy. It has excellent resistance to dezincification which makes it highly suitable for water-system applications, decorative parts and marine fittings. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as casting, forming, heat treating, machining, and joining. Filing Code: Cu-279. Producer or source: American Smelting and Refining Company.

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