Kinetics of Growth and Structure of Coatings Obtained on Sandelin Steels in the High-Temperature Galvanizing Process

2013 ◽  
Vol 212 ◽  
pp. 127-132 ◽  
Author(s):  
Henryk Kania
Keyword(s):  
High Temperature ◽  
Growth Kinetics ◽  
Structural Components ◽  
Compact Layer ◽  
Two Phase ◽  
Continuous Layer ◽  
Structure Of Coatings ◽  
Zinc Coatings ◽  
Kinetics Of ◽  
Diffuse Coating

In the paper the author presents the results of tests defining the characteristics of behaviour of Sandelin steel in the high-temperature galvanizing process. The growth kinetics of hot-dip zinc coatings on the substrate of 0.05% Si steel in the temperature range of 540-580°C has been established. The structure of the coatings and their phase composition have been developed and the chemical composition of structural components of the coating has be defined. It has been determined that the coating is composed of a compact layer δ1 and an area of a two-phase mixture of δ1 and Zn. The conducted tests confirmed the presence of phase Γ1 , which does not form a continuous layer but it forms individual precipitates which are irregular in shape. The growth kinetics of the coating indicates that an increase in temperature causes a decrease in the coating thickness, which might prove that dissolving processes prevailed over the processes of diffuse coating growth.

The Structure and Growth Kinetics of Zinc Coatings on Link Chains Produced of the 23MnNiCrMo5-2 Steel

2013 ◽  
Vol 212 ◽  
pp. 145-150 ◽  
Author(s):  
Henryk Kania ◽  
Piotr Liberski
Keyword(s):  
Chemical Composition ◽  
Growth Kinetics ◽  
Structural Components ◽  
Structure Of Coatings ◽  
Zinc Coatings ◽  
Kinetics Of

In the paper the results of tests on obtaining zinc coatings on chains produced of the 23MnNiCrMo5-2 steel of grades C and PW9 have been presented. The growth kinetics of coatings obtained in the traditional galvanizing process at the temperature of 450°C has been established. The structure of coatings obtained on chains of various grades has been developed. The chemical composition of structural components of the coating has be established. It has been determined that the obtained coatings are continuous and they are quite thick. No significant impact of the chain grade upon the structure of coating has been established, however, it has been observed that the thickness of coating slightly decreases as the grade increases.

The Influence of the Thickness of a Rebar on the Growth Kinetics and Structure of Hot Dip Zinc Coatings

2016 ◽  
Vol 246 ◽  
pp. 91-94
Author(s):  
Piotr Liberski ◽  
Konrad Migacz ◽  
Bartosz Chmiela
Keyword(s):  
Chemical Composition ◽  
Growth Kinetics ◽  
Coating Thickness ◽  
Structural Components ◽  
Zinc Bath ◽  
Structure Of Coatings ◽  
Zinc Coatings ◽  
The Impact ◽  
Kinetics Of ◽  
Coating Growth

In the paper the results of tests on obtaining zinc coatings on reinforcing steel are presented. The coatings were obtained in a zinc bath on B500SP rebars of various diameters. The structure of coatings obtained on rebars with the diameter of 12, 16, 20 and 32 mm has been developed. The chemical composition of structural components of the coating has been established. The growth kinetics of coatings obtained in the traditional galvanizing process at the temperature of 450°C has been established and the impact of the rebar diameter upon the coating growth curve has been defined. The obtained coatings are continuous and they are quite thick. Moreover, it has been determined that an increase in the rebar thickness induces an increase in the coating thickness.

The Structure of Coatings Obtained in a ZnAl23Si Bath by the Batch Hot Dip Method

2015 ◽  
Vol 226 ◽  
pp. 155-160 ◽  
Author(s):  
Henryk Kania
Keyword(s):  
Phase Composition ◽  
Chemical Composition ◽  
Growth Kinetics ◽  
Coating Thickness ◽  
Silicon Steel ◽  
Structural Components ◽  
Uniform Thickness ◽  
External Layer ◽  
Structure Of Coatings ◽  
Kinetics Of

In the paper the results of tests on obtaining ZnAl23Si coatings on low-silicon steel by use of the batch hot dip method have been presented. The growth kinetics of coatings obtained in a ZnAl23 bath with the content of 1% and 2% of Si has been defined. The structure has been developed, the chemical composition of particular structural components of the coating and its phase composition have been established. It has been determined that coatings obtained in the ZnAl23Si bath are continuous and they have uniform thickness. The presence of silicon in the bath allows to reduce excessive coating thickness. The coating is composed of an external layer which is formed by the bath components and of a diffusion layer of the intermetallic FeAl3phase.

The Structure of Coatings Obtained in the Zn-31Al-3Mg Bath on High-Silicon Steel

2013 ◽  
Vol 212 ◽  
pp. 101-106 ◽  
Author(s):  
Henryk Kania
Keyword(s):  
Chemical Composition ◽  
Growth Kinetics ◽  
Silicon Steel ◽  
Steel Plates ◽  
High Silicon Steel ◽  
Structure Of Coatings ◽  
High Silicon ◽  
Si Content ◽  
Zinc Coatings ◽  
Kinetics Of

Coatings obtained in Zn-Al-Mg baths on steel plates by using the continuous method provide effective protection against corrosion. They have greater corrosion resistance than traditional zinc coatings. Even though Zn-Al-Mg coatings have many advantages, they are not made on galvanized products by use of the batch hot dip method. For products galvanized by use of the batch hot dip method coating growth mainly depends on the content of silicon in the steel. An increase in coating thickness is particularly intense in the case of high-silicon steel. In the paper the results of tests on obtaining Zn-Al-Mg coatings on high-silicon steel by use of the batch hot dip method have been presented. The growth kinetics of coatings obtained in the Zn-31Al-3Mg bath on steel with Si content of 0.27% has been defined. The structure has been developed and the chemical composition of particular structural components of the coating has be established. It has been determined that coatings obtained in the Zn-31Al-3Mg bath are continuous and they have uniform thickness. The structure of the coating is compact and the chemical composition points to the presence of phases of the Fe-Al system. The presence of silicon in the steel limits steel reactivity in the tested bath. The course of growth kinetics of the coating is close to parabolic.

The Ordered Phase Formation in Ti-Al-Ga Alloys

1970 ◽  
Vol 28 ◽  
pp. 440-441
Author(s):  
Shiro Fujishiro ◽  
Harold L. Gegel
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Titanium Alloys ◽  
Growth Kinetics ◽  
Stoichiometric Composition ◽  
Good Potential ◽  
Alpha Titanium ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

Synergistic Influence of the Addition of Al, Ni and Pb to a Zinc Bath upon Growth Kinetics and Structure of Coatings

2013 ◽  
Vol 212 ◽  
pp. 115-120 ◽  
Author(s):  
Henryk Kania ◽  
Piotr Liberski
Keyword(s):  
Chemical Composition ◽  
Growth Kinetics ◽  
Current Knowledge ◽  
Silicon Steel ◽  
Optimum Concentration ◽  
Zinc Bath ◽  
Structure Of Coatings ◽  
Product Surface ◽  
Kinetics Of

In this paper the current knowledge about the influence of alloy additions used in galvanizing baths has been analysed. The optimum concentration of Al, Ni and Pb addition has been established. Tests have been conducted to determine the synergistic influence of the addition of AlNiPb in a zinc bath upon the structure and growth kinetics of coatings. The structure and the chemical composition of coatings obtained on steel with low silicon contents and on Sandelin steel have been developed. It has been determined that the synergistic influence of the AlNiPb addition effectively lowers the reactivity of Sandelin steel and it improves zincs flowing off the product surface which results in decreased zinc consumption and better appearance of the coating. The structure of coatings obtained in a Zn-AlNiPb bath on Sandelin steel is similar to the structure of coatings obtained on low-silicon steel.

Growth kinetics of particles of nitrides in process of high-temperature volume nitriding of wrought alloy of Ni-Co-Cr-W-Ti system

2015 ◽  
Vol 6 (1) ◽  
pp. 11-15 ◽  
Author(s):  
S. V. Ovsepyan ◽  
B. S. Bokstein ◽  
M. V. Akhmedzyanov ◽  
A. O. Rodin ◽  
I. S. Mazalov
Keyword(s):  
High Temperature ◽  
Growth Kinetics ◽  
Kinetics Of
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