Effects of boron concentration on the corrosion resistance of Fe–B alloys immersed in 460°C molten zinc bath

Fe-B alloys with different boron contents were dipped into a pure molten zinc bath to investigate their anti-corrosion property. Scanning electron microscope (SEM) and energy dispersive spectrum(EDS) were used to detect the corrosion products. It is found that the corrosion mechanism of α phase is corrosion and dissolution ,while the Fe2B phase is crack mechanism because of its brittleness and excellent corrosion resistance.The Fe2B phase in eutectic structure can protect the matrix from molten zinc and restrict the reaction of Fe-Zn. With the increase of boron content, the corrosion resistance performance of the alloys improves gradually.

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Influence of Boron Concentration on the Corrosion Resistance of High Boron White Cast Iron to Liquid Zinc Bath

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.457.219 ◽

2010 ◽

Vol 457 ◽

pp. 219-224

Author(s):

Sheng Qiang Ma ◽

Jian Dong Xing ◽

Da Wei Yi ◽

Jian Jun Zhang ◽

Sheng Chao Ma ◽

...

Keyword(s):

Corrosion Resistance ◽

Cast Iron ◽

Corrosion Rate ◽

Boron Concentration ◽

White Cast Iron ◽

Interface Reaction ◽

Liquid Zinc ◽

Pure Liquid ◽

Zinc Bath ◽

High Boron

The influence of boron concentration on corrosion resistance of high boron white cast iron dipped into a pure liquid zinc bath at 460°C was investigated. The results reveal that high boron white cast iron containing 3.5 wt.%B exhibits excellent corrosion resistance due to the dense continuous netlike or parallel Fe2B phase which hinders the Fe/Zn interface reaction. The corrosion rate decreases significantly when the boron concentration increases, but the corrosion rate declines slightly when the boron concentration exceeds 3.5wt.%. EDS results indicate the coarse and compact δ phase generated near the matrix and a large amount of massive and blocky  phase occurred close to the liquid zinc. The corrosion process includes Fe/Zn interface reaction and the spalling and fracture of Fe2B. The failure of Fe2B is mainly caused by the microcrack of phase transformation.

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Corrosion Resistance Studies of Austenitic Stainless Steel Grades in Molten Zinc-Aluminum Alloy Galvanizing Bath

Journal of Failure Analysis and Prevention ◽

10.1007/s11668-016-0103-4 ◽

2016 ◽

Vol 16 (3) ◽

pp. 427-437 ◽

Cited By ~ 5

Author(s):

Roland Tolulope Loto ◽

Emre Özcan

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Aluminum Alloy ◽

Austenitic Stainless Steel ◽

Molten Zinc ◽

Steel Grades

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Corrosion Resistance to Molten Zinc of a Novel Cermet Coating Deposited by Activated Combustion High-Velocity Air Fuel (AC-HVAF)

Journal of Thermal Spray Technology ◽

10.1007/s11666-019-00893-x ◽

2019 ◽

Vol 28 (6) ◽

pp. 1252-1262

Author(s):

Xiaolong Xie ◽

Fucheng Yin ◽

Xinming Wang ◽

Xuemei Ouyang ◽

Minghuan Li ◽

...

Keyword(s):

Corrosion Resistance ◽

High Velocity ◽

Molten Zinc ◽

Cermet Coating

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Structural Aspects of Decreasing the Corrosion Resistance of Zinc Coating Obtained in Baths with Al, Ni, and Pb Additives

Materials ◽

10.3390/ma13020385 ◽

2020 ◽

Vol 13 (2) ◽

pp. 385 ◽

Cited By ~ 5

Author(s):

Henryk Kania ◽

Mariola Saternus ◽

Jan Kudláček

Keyword(s):

Corrosion Resistance ◽

Salt Spray ◽

Zinc Coating ◽

Neutral Salt ◽

Zinc Bath ◽

Coating Structure ◽

Humid Atmosphere ◽

Pure Zinc ◽

Si Content ◽

Structural Aspects

The article presented the results of tests determining the synergistic effect of Al, Ni, and Pb additions on a zinc bath on the structure and corrosion resistance of coatings obtained on low silicon steel. Analyzed coatings were produced on S235JRG2 steel with Si content of 0.02 mass%. The corrosion resistance of the coatings was compared with the corrosion resistance of the coating obtained in the "pure" zinc bath. Structure at high magnifications (SEM) was determined, as well as coating thickness and chemical composition in microspheres. The corrosion resistance of the coatings was established comparatively in standard corrosion tests in neutral salt spray and a humid atmosphere containing SO2. It was found that the addition of Pb to the zinc bath reduced the corrosion resistance of the coatings. In the coating structure obtained in the Zn-AlNiPb bath, lead precipitation was observed in both the outer layer and the intermediate layer of the coating. Grain boundaries were the preferred site for lead precipitation. The presence of Pb precipitates favored conditions for the creation of additional corrosion cells, which led to a decrease in the corrosion resistance of the coatings.

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Influence of aluminum additions to molten zinc on the corrosion resistance of iron-based alloys

Soviet Materials Science ◽

10.1007/bf00722112 ◽

1984 ◽

Vol 19 (6) ◽

pp. 493-495

Author(s):

S. S. Vasil'eva ◽

F. F. Azhogin ◽

A. I. Shchuchkin

Keyword(s):

Corrosion Resistance ◽

Molten Zinc ◽

Iron Based

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Metastable Phases of Dross Particles Formed in a Molten Zinc Bath and Prediction of Soluble Aluminum During Galvannealing Processes

Metallurgical and Materials Transactions A ◽

10.1007/s11661-011-1056-6 ◽

2012 ◽

Vol 43 (6) ◽

pp. 1934-1943 ◽

Cited By ~ 3

Author(s):

Doo-Jin Paik ◽

Moon-Hi Hong ◽

Yoon Huh ◽

Joo Hyun Park ◽

Hong-Kook Chae ◽

...

Keyword(s):

Metastable Phases ◽

Zinc Bath ◽

Molten Zinc ◽

Soluble Aluminum

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The effect of zinc bath temperature on the morphology, texture and corrosion behaviour of industrially produced hot-dip galvanized coatings

Metallurgical and Materials Engineering ◽

10.5937/metmateng1401041b ◽

2014 ◽

Vol 20 (1) ◽

pp. 41-52 ◽

Cited By ~ 4

Author(s):

A. Bakhtiari ◽

M.R. Toroghinejad ◽

F. Ashrafizadeh

Keyword(s):

Corrosion Resistance ◽

Corrosion Behavior ◽

Texture Component ◽

Corrosion Behaviour ◽

Salt Spray ◽

Bath Temperature ◽

X Ray Diffraction ◽

Zinc Bath ◽

Compact Structure ◽

Galvanized Coatings

The purpose of this work is to identify the influence of zinc bath temperature on the morphology, texture and corrosion behavior of hot-dip galvanized coatings. Hot-dip galvanized samples were prepared at temperature in the range of 450-480 °C in steps of 10 °C, which is the conventional galvanizing temperature range in the galvanizing industries. The morphology of coatings was examined with optical microscopy and scanning electron microscopy (SEM). The composition of the coating layers was determined using energy dispersive spectroscopy (EDS) analysis. The texture of the coatings was evaluated using X-ray diffraction. Corrosion behavior was performed using salt spray cabinet test and Tafel extrapolation test. From the experimental results, it was found that increasing the zinc bath temperature affects the morphology of the galvanized coatings provoking the appearance of cracks in the coating structure. These cracks prevent formation of a compact structure. In addition, it was concluded that (00.2) basal plane texture component was weakened by increasing the zinc bath temperature and, conversely, appearance of (10.1) prism component, (20.1) high angle pyramidal component and low angle component prevailed. Besides, coatings with strong (00.2) texture component and weaker (20.1) components have better corrosion resistance than the coatings with weak (00.2) and strong (20.1) texture components. Furthermore, corrosion resistance of the galvanized coatings was decreased by increasing the zinc bath temperature.

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