Production problems of hot dip galvanized metal structures

Paramonov, A. V.; Adamov, A. S.; Chernetsov, V. Yu.

doi:10.1007/s11015-011-9376-8

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 20-30 days thermal shock treatment belongs to the stable period. At this stage, the Zn reacts with the corrosive medium before Fe to form the corrosive product ZnO.ZnCl2.xH2O [10][11], which is deposited on the surface of the samples. The corrosion products hinder the infiltration of the corrosion medium and slow down the corrosion rate.…”

Section: Resultsmentioning

confidence: 99%

Study on environmental corrosion performance of hot dip galvanizing coating

Liu

Jia

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

In order to analyze the influence of environmental factors on the corrosion resistance of hot-dip galvanized coating, a naturally clean environment and thermal shock treatment were used to simulate the service conditions of products. The surface state and zinc layer thickness of hot-dip galvanized coating under two process conditions were detected. Salt spray corrosion and electrochemical corrosion tests were carried out on hot-dip galvanized coatings. The phase and microstructure of the coating were analyzed by XRD, OM, and SEM. The results show that the hot-dip galvanized coating has a good corrosion protection effect in a naturally clean environment. After thermal shock treatment, cracks in the coating are more likely to occur. With the increase of thermal shock time, the depth of crack on the surface of the coating increases, so the corrosion protection effect of the coating decreases obviously. For the thermal shock treatment of 10-30 days, the coating performance enters the corrosion stability period, and the thickness decreases very little, but when the time exceeds 30 days, the corrosion of the coating accelerates sharply. Electrochemical corrosion shows that the hot-dip galvanized coating has typical coating protection double capacitive reactance curve, and the polar protection effect is good. When the thermal shock treatment time is 30 days, the dense oxide on the coating surface has the best protection effect against corrosion. At this time, the self corrosion current is the smallest and the impedance radius is the largest. When the thermal shock treatment time exceeds 40 days, the cracks on the coating surface will expand to the substrate, and the corrosion protection effect of the coating may fail. So, the corrosion protection effect of hot-dip galvanized coating is limited in the current situation of frequent extreme environments and intensified environmental pollution.

show abstract

Section: Resultsmentioning

confidence: 99%

Study on environmental corrosion performance of hot dip galvanizing coating

Liu

Jia

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…Zn addition can reduce the self-corrosion potential of the Al-rich coating [20]. In the study of Al-Zn-Si coating, A, V, Paramonov [21] believed that 4%-6% of Zn had better corrosion resistance. Therefore, this study selected the Zn content of 5%.…”

Section: Introductionmentioning

confidence: 99%

Effect of Mg Addition on Microstructure and Sacrificial Anode Protection Performance of Hot Dip Al-5Zn-4Si-xMg Coating

Liu

Peng

et al. 2023

Coatings

View full text Add to dashboard Cite

The effect of Mg addition on the microstructure and sacrificial anode protection performance of a hot-dip Al-5Zn-4Si-xMg coating was studied by scanning electron microscopy (SEM-EDS), an X-ray diffractometer, and an electrochemical workstation. The results showed that Al-Zn-Si alloy was composed of an Al-rich phase and a Zn-rich phase. The MgZn2 phase appears after Mg addition. When the addition of Mg increased to 0.15 wt.%, the Mg2Si phase began to appear in the alloy. The hot-dip Al-5Zn-4Si-xMg coating consisted of Si particles, an Al-rich phase and a Zn-rich phase. When the Mg content increased to 0.15 wt.%, the Mg2Si phase and Al + Zn + MgZn2 eutectoid phase began to appear in the coating. In the full immersion corrosion test of the hot-dip Al-5Zn-4Si-xMg coating, the order of corrosion resistance was 0.15% Mg coating > 0.2% Mg coating > 0.05% Mg coating > 0 Mg coating. In the corrosion process of the hot-dip Al-5Zn-4Si-0.15Mg coating, with the increase in immersion, the self-corrosion current of the coating decreased, and the sacrificial protection performance was the best.

show abstract

Production problems of hot dip galvanized metal structures

Cited by 2 publications

References 0 publications

Study on environmental corrosion performance of hot dip galvanizing coating

Study on environmental corrosion performance of hot dip galvanizing coating

Effect of Mg Addition on Microstructure and Sacrificial Anode Protection Performance of Hot Dip Al-5Zn-4Si-xMg Coating

Contact Info

Product

Resources

About