Corrosion Resistance of Inconel 625 and Austenitic Steel M41 after Laser Claddings

2015 ◽  
Vol 647 ◽  
pp. 115-120
Author(s):  
Stanislav Němeček ◽  
Lukáš Fiedler ◽  
Pavla Fišerová
Keyword(s):  
Corrosion Resistance ◽  
Chemical Composition ◽  
Chemical Analysis ◽  
Substrate Temperature ◽  
Austenitic Steel ◽  
Microscopic Observation ◽  
Steel Substrate ◽  
Inconel 625 ◽  
Profound Impact ◽  
The Impact

<span><p><span lang="DE">The present paper explores the impact of laser cladding parameters on the corrosion behavior of the resulting surface. Powders of Inconel 625 and austenitic Metco <st1:metricconverter w:st="on" productid="41C">41C</st1:metricconverter> steel were deposited on steel substrate. It was confirmed that the level of dilution has profound impact on the corrosion resistance and that dilution has to be minimized. However, the chemical composition of the cladding is altered even in the course of the cladding process, a fact which is related to the increase in the substrate temperature. The cladding process was optimized to achieve maximum corrosion resistance. The results were verified and validated using microscopic observation, chemical analysis and corrosion testing. </span></p>

scholarly journals Characteristics of Cr-B Coatings Produced on Vanadis® 6 Tool Steel Using Laser Processing

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2621
Author(s):  
Aneta Bartkowska
Keyword(s):  
Corrosion Resistance ◽  
Tool Steel ◽  
Laser Processing ◽  
Chemical Elements ◽  
Steel Substrate ◽  
Processing Parameters ◽  
Beam Power ◽  
Laser Beam Power ◽  
High Microhardness ◽  
The Impact

The paper presents the results of a study of the microstructure, chemical composition, microhardness and corrosion resistance of Cr-B coatings produced on Vanadis 6 tool steel. In this study, chromium and boron were added to the steel surface using a laser alloying process. The main purpose of the study was to determine the impact of those chemical elements on surface properties. Chromium and boron as well as their mixtures were prepared in various proportions and then were applied on steel substrate in the form of precoat of 100 µm thickness. Depending on the type of precoat used and laser processing parameters, changes in microstructure and properties were observed. Coatings produced using precoat containing chromium and boron mixture were characterized by high microhardness (900 HV0.05–1300 HV0.005) while maintaining good corrosion resistance. It was also found that too low laser beam power contributed to the formation of cracks and porosity.

The Impact of Zinc Coating Specifications on Corrosion Resistance аnd Durability of Steels

2019 ◽  
Vol 945 ◽  
pp. 740-745
Author(s):  
I.A. Kovalenko ◽  
D.V. Laskin ◽  
A.Y. Trifonova
Keyword(s):  
Corrosion Resistance ◽  
Statistical Analysis ◽  
Chemical Composition ◽  
Service Life ◽  
Zinc Coating ◽  
Useful Life ◽  
Galvanized Coating ◽  
Zinc Coatings ◽  
The Impact ◽  
High Chloride

The article contains the findings on impact of zinc coating specifications on corrosion resistance and service life of steels of various chemical composition used often in modern industries. Characteristics such as type, class, chemical compound and thickness of zinc-based coatings are also addressed. Experiments were performed in which corrosion rate and useful life of zinc coatings in probable operating-like conditions — i.e., in environments of varying degrees of corrosive power (humid and high-chloride environments) were determined. It has been established which one of the environments is the most corrosive for steels depending on the zinc-based coatings’ specifications. Qualitative (visual) and quantitative (gravimetric) assessment of corrosion resistance and service life of chosen steels is presented. Optimal hot dip galvanized coating specifications were determined using statistical analysis.

scholarly journals Preparation of WC Reinforced Co-Based Alloy Gradient Coatings on a H13 Mold Steel Substrate by Laser Cladding

Coatings ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 176
Author(s):  
Chenchen Li ◽  
Xuefeng Yang ◽  
Shouren Wang ◽  
Yanjun Wang ◽  
Jinlong Cao
Keyword(s):  
Corrosion Resistance ◽  
Wear Mechanism ◽  
Steel Substrate ◽  
Substrate Surface ◽  
Impact Resistance ◽  
Surface Hardness ◽  
Wear Loss ◽  
Stress Relieving ◽  
Gradient Coatings ◽  
The Impact

H13 die steel often fails as a result of physical and chemical effects such as wear, erosion and cyclic stress. Accordingly, the study evaluates Co-based gradient coating on an H13 steel featuring a stress-relieving effect. Scanning electron microscope and X-ray diffraction were used to analyze the microstructure and phase of the coatings. A microhardness tester and friction and wear tester were used to compare the hardness and wear resistance of the coatings and the substrate, and the wear morphology was observed. A pendulum impact test was used to compare the impact resistance of the coatings and the substrate, and the fracture morphology was observed. Finally, a corrosion test was used to compare the corrosion resistance of coatings and substrate. The results show that the Co-based gradient coatings have good combinations with the substrate, the hard phase content gradually increases from the bottom to the top of the coating, and the crystal microstructure generally maintains a distribution trend from coarse to fine. The hardness of the gradient coatings is significantly higher than the substrate, and from the coating surface to the substrate, the hardness decreases slowly. The wear loss of the coatings is much lower than that of the substrate, the main wear mechanism of the substrate is abrasive wear, and the main wear mechanism of the coatings is brittle spalling. While the gradient coatings increase the surface hardness, the brittleness also increases, the impact resistance of the coatings is lower than that of the substrate, the fracture form of the substrate is a ductile fracture, and the fracture form of the coating is a brittle fracture. The gradient coatings effectively improve the corrosion resistance of the substrate surface, and the higher the content of the reinforcing phase, the better the corrosion resistance of the coatings.

The Influence of Sodium Molybdate on the Properties of Zn-Ni Layers Obtained by Electrolytic Deposition

2010 ◽  
Vol 636-637 ◽  
pp. 1053-1058 ◽  
Author(s):  
Katarzyna Wykpis ◽  
Antoni Budniok ◽  
Eugeniusz Łągiewka
Keyword(s):  
Corrosion Resistance ◽  
Chemical Composition ◽  
Surface Morphology ◽  
Electrochemical Impedance ◽  
Chemical Elements ◽  
Steel Substrate ◽  
Sodium Molybdate ◽  
Open Circuit ◽  
Electrolytic Deposition ◽  
Structural Investigations

This study was undertaken in the aim to try the limit of extraction of Zn from Zn-Ni system. The aim was realized by the addition of MoO42- ions into the galvanic bath containing Ni2+ and Zn2+ ions. Zn-Ni-Mo layers were deposited under galvanostatic conditions on (OH18N9) austenitic steel substrate. The influence of Na2MoO4 concentration in a bath on the surface morphology, chemical and phase composition and the corrosion resistance of obtained layers, was investigated. The properties of Zn-Ni-Mo layers were compared to the properties of electrolytic Zn-Ni layer. Structural investigations were performed by the X-ray diffraction (XRD) method. The surface morphology and chemical composition and surface chemical elements distribution of deposited layers were studied using a scanning electron microscope. Electrochemical corrosion resistance investigations were done by classical Stern method and electrochemical impedance spectroscopy. The potentiodynamic curves in the range of  0.05V to the potential of open circuit, were obtained. On the base of these curves the parameters like corrosion potential- Ecor, corrosion current density- icor and the polarization resistance- Rp were determined. These values served as a measure of the corrosion resistance of obtained layers. Results of impedance investigations were presented on the Nyquist Z”= f (Z’) and the Bode log Z = f (log) and  = f (log), diagrams. On the basis on this research, it was exhibited that surface morphology, chemical composition of Zn-Ni-Mo layers are dependent on Mo contents. The optimal content of Na2MoO4 in the bath for the sake of corrosion resistance in 5% NaCl, is found to be 1.2 gdm-3.

scholarly journals Evaluation of High Temperature Corrosion Resistance of Finned Tubes Made of Austenitic Steel And Nickel Alloys

2016 ◽  
Vol 61 (2) ◽  
pp. 1089-1093
Author(s):  
A. Turowska ◽  
J. Adamiec
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Austenitic Steel ◽  
Nickel Alloys ◽  
High Temperature Corrosion ◽  
Energy Industry ◽  
Inconel 625 ◽  
Good Resistance ◽  
Inconel 600 ◽  
Finned Tubes

Abstract The purpose of the paper was to evaluate the resistance to high temperature corrosion of laser welded joints of finned tubes made of austenitic steel (304,304H) and nickel alloys (Inconel 600, Inconel 625). The scope of the paper covered the performance of corrosion resistance tests in the atmosphere of simulated exhaust gases of the following chemical composition: 0.2% HCl, 0.08% SO2, 9.0% O2 and N2 in the temperature of 800°C for 1000 hours. One found out that both tubes made of austenitic steel and those made of nickel alloy displayed good resistance to corrosion and could be applied in the energy industry.

scholarly journals Durability of Polymer Powder Coatings

2021 ◽  
Vol 346 ◽  
pp. 02043
Author(s):  
Vladimir Fedyaev ◽  
Engel Galimov ◽  
Alexey Belyaev ◽  
Liliya Sirotkina
Keyword(s):  
Corrosion Resistance ◽  
Chemical Composition ◽  
Adhesive Strength ◽  
Operating Time ◽  
Coating Material ◽  
Powder Coatings ◽  
Integral Criterion ◽  
Polymer Powder ◽  
Composition And Structure ◽  
The Impact

The durability of polymer powder coatings is considered. The features of the impact on coatings during their operation of the environment, loads from the side of the substrate on the surface of its contact with the coatings, parameters that depend on the chemical composition and structure of the coating material are briefly analyzed. The thickness of the coating stands out as the main indicators of durability; a function that characterizes the continuity, strength, corrosion resistance, and its other properties; adhesive strength. It is proposed to use a generalized (integral) criterion for a comprehensive accounting of these indicators. An equation is written to assess the durability of the considered coatings, in a particular case, a formula is given for calculating their permissible operating time.

Corrosion Resistance of TiN Coating on 304 Steel

2011 ◽  
Vol 121-126 ◽  
pp. 3779-3783
Author(s):  
Shiuh Chuan Her ◽  
Cheng Lin Wu
Keyword(s):  
Corrosion Resistance ◽  
Magnetron Sputtering ◽  
Substrate Temperature ◽  
Steel Substrate ◽  
High Surface ◽  
Surface Hardness ◽  
Deposition Parameters ◽  
Wear And Corrosion ◽  
Tin Thin Films ◽  
Wear And Corrosion Resistance

Titanium Nitride (TiN) coatings with high surface hardness, good wear and corrosion resistance, low friction coefficient have been widely used in many applications such as a hard coating of cutting tool, a diffusion barrier layer. In this work, TiN thin films were deposited by D.C. magnetron sputtering process on SUS 304 steel substrate. Magnetron sputtering provides a wide variation of the deposition parameters which affect the morphology of the films and, consequently, their properties. The effects of substrate temperature on the microstructure and corrosion resistance of TiN films were studied in details using atomic force microscopy and potentiostat test. Considerable improvements in the surface roughness and corrosion resistance were observed when the substrate temperature was increased from C to C.

scholarly journals Impact of the Allowed Compositional Range of Additively Manufactured 316L Stainless Steel on Processability and Material Properties

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4074
Author(s):  
Felix Großwendt ◽  
Louis Becker ◽  
Arne Röttger ◽  
Abootorab Baqerzadeh Chehreh ◽  
Anna Luise Strauch ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Additive Manufacturing ◽  
Chemical Composition ◽  
316L Stainless Steel ◽  
Nickel Content ◽  
Equivalent Ratio ◽  
Compositional Range ◽  
The Impact ◽  
Nickel Equivalent

This work aims to show the impact of the allowed chemical composition range of AISI 316L stainless steel on its processability in additive manufacturing and on the resulting part properties. ASTM A276 allows the chromium and nickel contents in 316L stainless steel to be set between 16 and 18 mass%, respectively, 10 and 14 mass%. Nevertheless, the allowed compositional range impacts the microstructure formation in additive manufacturing and thus the properties of the manufactured components. Therefore, this influence is analyzed using three different starting powders. Two starting powders are laboratory alloys, one containing the maximum allowed chromium content and the other one containing the maximum nickel content. The third material is a commercial powder with the chemical composition set in the middle ground of the allowed compositional range. The materials were processed by laser-based powder bed fusion (PBF-LB/M). The powder characteristics, the microstructure and defect formation, the corrosion resistance, and the mechanical properties were investigated as a function of the chemical composition of the powders used. As a main result, solid-state cracking could be observed in samples additively manufactured from the starting powder containing the maximum nickel content. This is related to a fully austenitic solidification, which occurs because of the low chromium to nickel equivalent ratio. These cracks reduce the corrosion resistance as well as the elongation at fracture of the additively manufactured material that possesses a low chromium to nickel equivalent ratio of 1.0. A limitation of the nickel equivalent of the 316L type steel is suggested for PBF-LB/M production. Based on the knowledge obtained, a more detailed specification of the chemical composition of the type 316L stainless steel is recommended so that this steel can be PBF-LB/M processed to defect-free components with the desired mechanical and chemical properties.

UGIMA 4307 HM

Alloy Digest ◽  
2013 ◽  
Vol 62 (12) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Physical Properties ◽  
Austenitic Steel ◽  
Tensile Properties ◽  
Heat Treating ◽  
General Purpose ◽  
Corrosion Resistant

Abstract Ugima 4307 HM is a general-purpose, corrosion resistant austenitic stainless steel with improved machinability. Its corrosion resistance is typical of an austenitic steel and is similar to that of 4307 or 304L. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-1163. Producer or source: Schmolz + Bickenbach USA Inc..

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