Abrasion Resistance and Corrosion Resistance of Chromium-Free Fingerprint-Resistant Zn and Zn-Al-Mg Coating Cold-Rolled Steel Sheets

The wear resistance and corrosion resistance of chromium-free fingerprint-resistant pure zinc and Zn-Al-Mg coated cold-rolled steel sheets were studied by micro-friction wear experiments and neutral salt spray experiments. Two products are worn for a long time with a large load (5N load, 50 times abrasion), the depth of wear zone of Zn-Al-Mg coating product is 9% shallower than that of pure zinc coating product, and the width of wear zone is 15.4% smaller. Both products still meet the requirements of use after corrosion. The corrosion resistance of two products after degreasing treatment was significantly reduced. The Mg and Al in the Zn-Al-Mg coating can hinder the progress of corrosion, so it has better corrosion resistance.

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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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Microstructure Characterization and Corrosion Resistance of Zinc Coating Obtained in a Zn-AlNiBi Galvanizing Bath

Coatings ◽

10.3390/coatings10080758 ◽

2020 ◽

Vol 10 (8) ◽

pp. 758

Author(s):

Henryk Kania ◽

Mariola Saternus ◽

Jan Kudláček ◽

Jakub Svoboda

Keyword(s):

Corrosion Resistance ◽

Salt Spray ◽

Zinc Coating ◽

Corrosion Current ◽

Neutral Salt ◽

Zinc Bath ◽

Electrochemical Test ◽

Humid Atmosphere ◽

Pure Zinc ◽

The Impact

The article examines the impact of the addition of Al, Ni, and Bi to a zinc bath on the microstructure and corrosion resistance of hot dip galvanizing coatings. The microstructure on the surface and the cross-section of the coatings obtained in the Zn-AlNiBi bath were examined. The corrosion resistance of the coatings was assessed by the standard neutral salt spray test (EN ISO 9227), the sulfur dioxide test in a humid atmosphere (EN ISO 6988), and the electrochemical test. The corrosion resistance of Zn-AlNiBi coatings was compared with the corrosion resistance of coatings attained in the bath of “pure” zinc. The corrosion tests showed higher corrosion wear of the coating obtained in the Zn-AlNiBi bath and a higher value of the corrosion current density for this coating. It was found that the cause of the reduction of the corrosion resistance of the coating, in contrast to the coating obtained in the “pure” zinc bath, may be the presence of bismuth precipitates in the coating, which may form additional corrosion cells.

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A Comparative Study of Zirconium-Based Coating on Cold Rolled Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.291-294.47 ◽

2011 ◽

Vol 291-294 ◽

pp. 47-52 ◽

Cited By ~ 4

Author(s):

Shuang Hong Wang ◽

Chang Sheng Liu ◽

Lei Wang

Keyword(s):

Salt Water ◽

Salt Spray ◽

Conversion Coating ◽

Neutral Salt ◽

Rolled Steel ◽

Corrosion Performance ◽

Adhesion Test ◽

Adhesion Properties ◽

Cold Rolled Steel ◽

Cold Rolled

An experimental zirconium-based conversion coating on cold rolled steel was investigated in the present work. The following tests on differently pretreated panels, such as bonderite®NT-1, oxsilan®9810/1 and lz-4356, were conducted to evaluate corrosion performance include adhesion test, T-bent test, neutral salt spray test and warm salt water dipping test and electrochemical studies were also performed. The whole results showed that the experimental zirconium-based conversion coating had well-pleasing corrosion protection properties and adhesion properties, and similar lever performance as compared to the other industrial coatings. The experimental zirconium-based conversion coating was very hopeful about industrial application.

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The Influence of Surface Films on Corrosion Resistance of Cold Rolled Steel Sheets afterward Phosphated and Electro-painted

Tetsu-to-Hagane ◽

10.2355/tetsutohagane1955.66.7_935 ◽

1980 ◽

Vol 66 (7) ◽

pp. 935-944 ◽

Cited By ~ 2

Author(s):

Toshio FUKUZUKA ◽

Kazuichi KAJIWARA ◽

Kenji MIKI ◽

Shigeki KIRIHARA ◽

Tomoyuki HOSHINO ◽

...

Keyword(s):

Corrosion Resistance ◽

Surface Films ◽

Rolled Steel ◽

Cold Rolled Steel ◽

Steel Sheets ◽

Cold Rolled

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Spot Weldability Assessment of Similar and Dissimilar Steel Sheets for Light Weight Automobile Body

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.306-308.899 ◽

2006 ◽

Vol 306-308 ◽

pp. 899-904

Author(s):

Dong Ho Bae ◽

Won Seok Jung ◽

J.B. Heo

Keyword(s):

Stainless Steel ◽

Fatigue Strength ◽

Lap Joints ◽

Vehicle Body ◽

Rolled Steel ◽

Cold Rolled Steel ◽

Steel Sheets ◽

Automobile Body ◽

Cold Rolled ◽

Spot Welded

An effective way to reduce the weight of vehicle body seems to be application of new materials, and such trend is remarkable. Among the various materials for automobile body, stainless steel sheets and cold rolled steel sheets are under the interests. However, in order to guarantee reliability of new material and to establish the long life fatigue design criteria for body structure, it is necessary to assess spot weldability and fatigue strength of spot welded lap joints fabricated under optimized spot welding condition. In this paper, spot weldability of stainless steel sheets, STS301L and STS304L, and cold rolled steel sheets, SPCC and SPCD. Fatigue strength of lap joints spot welded between similar and dissimilar materials were also assessed.

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