Study on the Corrosion-Inhibiting Effect of Sodium Lignosulfonate Derivatives on Rebar

JIANG Shuaishuai, YANG Heng, ZHOU Yuxin, JI Tao, NIU Longlong, ZHANG Shiping

doi:10.16577/j.issn.1001-1560.2024.0184

Materials Protection >

2024 , Vol. 57 >Issue 8: 115 - 121

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0184

Study on the Corrosion-Inhibiting Effect of Sodium Lignosulfonate Derivatives on Rebar

Expand

(1.College of Civil Engineering， Anhui Jianzhu University， Hefei 230601， China；2.Materials and Structural Engineering Department， Nanjing Hydraulic Research Institute， Nanjing 210029， China；3.School of Architecture Engineering， Nanjing Institute of Technology， Nanjing 211167， China)

ZHANG Shiping(1982-)， Ph.D.， Professor， Research Focus: Concrete， Tel: 13770604152，E - mail:18018595459＠163.com

Received date: 2023-09-22

Revised date: 2024-01-07

Accepted date: 2024-01-15

Online published: 2024-09-24

Supported by

National Natural Science Foundation of China(5207827)

Fold

Abstract

Reinforced concrete structures often fail prematurely due to rebar corrosion.Adding corrosion inhibitors can effectively mitigate rebar corrosion and enhance the durability of reinforced concrete structures.Lignosulfonate， as a green and efficient component， exhibits good corrosion-inhibiting properties.However， its water-reducing effect is bad， and it cannot independently meet the technological demands of modern concrete technology for high fluidity and strength.In this study， sodium lignosulfonate was modified by grafting hydroxyl and carboxyl groups to synthesize sodium lignosulfonate derivatives.These derivatives were then incorporated into simulated pore solutions and cement mortar to investigate their corrosion-inhibiting effects on rebar.Results showed that， in both simulated alkaline chloride environments and mortar accelerated corrosion environments，the sodium lignosulfonate derivatives increased the charge transfer resistance and reduced the corrosion current density，demonstrating significant corrosion inhibition.When the water-cement ratio was 0.35，the flowability of the cement paste with the addition of sodium lignosulfonate derivatives reached 350 mm， with a water-reducing effect comparable to that of polycarboxylate， thus meeting the requirements for concrete flowability and strength.

Key words： sodium lignosulfonate; modification; corrosion inhibitor; rebar; chloride ion

Cite this article

JIANG Shuaishuai, YANG Heng, ZHOU Yuxin, JI Tao, NIU Longlong, ZHANG Shiping . Study on the Corrosion-Inhibiting Effect of Sodium Lignosulfonate Derivatives on Rebar[J]. Materials Protection, 2024 , 57(8) : 115 -121 . DOI: 10.16577/j.issn.1001-1560.2024.0184

Options

Outlines

模态框（Modal）标题

Abstract

Cite this article