The study of the effectiveness of corrosion protection of zinc-rich coating on the base of water sodium silicate
https://doi.org/10.31615/j.corros.prot.2020.98.4-4
Abstract
The study is examines the assessment of the corrosion-protective properties of zinc-rich coating based on water sodium silicate (ZRC) using the Electrochemical Impedance Spectra (EIS) with AutoLAB PGSTAT204N. The system consists of three electrodes: Ag/AgCl reference electrode in 3 M solution of KCl, auxiliary electrode – Pt (8x8 mm) and working electrodes for determination potential (Ecorr) and impedance measurement, salt spray test method and natural teszzt method at Dam Bay Marine Research Station, Nha Trang, Khanh Hoa, Viet Nam. ZSC can provide good cathodic protection when zinc content is 70% by weight or more. ZSC with a mixing ratio of High Modulus Liquid Sodium Glass / Zinc Powde : 25/75 by weight (working title – TTL-VN) has good corrosion protection after 16 cycles salt spray test and after 18 months natural test in seawater. The paint film has basic parameters as adhesion – 4,41 MPa, flexural strength – 2 mm, pendulum hardness – 0,62 conventional units and initial coating potentia l – 0,96 V Ag/AgCl.
About the Authors
Hong Quan Le
Russian-Vietnamese Tropical Cente
Viet Nam
Viet Nam
Le Hong Quan, researcher
63, Nguyen Van Huyen street, Cau Giay District, Hanoi city
Van Chi Nguyen
Russian-Vietnamese Tropical Cente
Viet Nam
Viet Nam
Nguyen Van Chi, researcher
63, Nguyen Van Huyen street, Cau Giay District, Hanoi city
Van Minh Mai
Russian-Vietnamese Tropical Cente
Viet Nam
Viet Nam
Mai Van Minh, researcher
63, Nguyen Van Huyen street, Cau Giay District, Hanoi city
Quoc Quang Nong
Russian-Vietnamese Tropical Cente
Viet Nam
Viet Nam
Nong Quoc Quang, researcher
63, Nguyen Van Huyen street, Cau Giay District, Hanoi city
Van Kien Dong
Russian-Vietnamese Tropical Cente
Viet Nam
Viet Nam
Dong Van Kien, researcher
63, Nguyen Van Huyen street, Cau Giay District, Hanoi city
Nhat Linh Cao
Russian-Vietnamese Tropical Cente
Viet Nam
Viet Nam
63, Nguyen Van Huyen street, Cau Giay District, Hanoi city
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Review
For citations:
Le H., Nguyen V., Mai V., Nong Q., Dong V., Cao N. The study of the effectiveness of corrosion protection of zinc-rich coating on the base of water sodium silicate. Theory and Practice of Corrosion Protection. 2020;25(4):32-39. (In Russ.) https://doi.org/10.31615/j.corros.prot.2020.98.4-4
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