Corrosion inhibition mechanism of modified lignosulfonate GCL2-D1

YI Conghua; QIU Xueqing; YANG Dongjie; LOU Hongming

您当前的位置：

首页 >

文章列表页 >

Corrosion inhibition mechanism of modified lignosulfonate GCL2-D1

更新时间：2025-12-10

- Corrosion inhibition mechanism of modified lignosulfonate GCL2-D1
- CIESC Journal Issue 4, Pages: 959-964(2009)
- 作者机构：
  
  华南理工大学制浆造纸工程国家重点实验室，化学与化工学院,广东,广州,510640
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 April 2009，
  
  Published：05 April 2009
- 稿件说明：
移动端阅览
YI Conghua, QIU Xueqing, YANG Dongjie, et al. Corrosion inhibition mechanism of modified lignosulfonate GCL2-D1[J]. CIESC Journal, 2009, (4): 959-964.
DOI：

YI Conghua, QIU Xueqing, YANG Dongjie, et al. Corrosion inhibition mechanism of modified lignosulfonate GCL2-D1[J]. CIESC Journal, 2009, (4): 959-964. DOI：

摘要

采用凝胶渗透色谱、化学滴定法、紫外差示光谱法、环境扫描电镜、交流阻抗谱、俄歇能谱等方法研究了改性前后木质素磺酸盐的结构特征和缓蚀性能，揭示了缓蚀作用机理。改性后木质素磺酸盐的分子量从11048提高到29381，磺酸基含量从9.04%提高到11.2%，羧基含量从5.81%提高到15.84%，在溶液中的构型由球状变为直链状，在金属表面吸附膜层S、Ca、C含量均增加，表明改性木质素磺酸盐在金属表面吸附点增多，吸附量增大。电化学测试结果表明改性木质素磺酸盐（简称GCL2-D1）属于混合抑制型缓蚀剂，腐蚀介质中掺加100 mg8226;L-1GCL2-D1能使腐蚀过程电荷传递电阻从564 Ω增加至20680 Ω，金属/溶液界面电容从2.84 mF降低至0.041 mF，说明改性后的木质素磺酸盐能够在金属表面形成致密的膜层，从而抑制金属腐蚀。

Abstract

The corrosion inhibition mechanism of modified lignosulfonate GCL2-D1 was studied by using methods of GPC

titration

differential UV-absorption spectrum

ESEM

EIS

etc.The results showed that the structure and corrosion inhibition properties of the lignosulfonate changed greatly after modification.The molecular weight changed from 11048 to 29381.The sulfonic content increased from 9.04% to 11.2%

and the carboxyl content increased from 5.81% to 15.84%.Through modification

the lignosulfonate extended itself in the solution from spherical shape to linear chains.When adsorbed on metal surface

the contents of S

and C had an obvious increase in the interfacial film

indicating the increase of adsorption points and adsorption amount of the modified lignosulfonate GCL2-D1.Electrochemical analysis demonstrated that GCL2-D1 belonged to mixed inhibitor.When the dosage of GCL2-D1 was 100 mg8226;L-1

the charge transfer resistance increased from 564 Ω to 20680 Ω

and the interfacial capacity between metal and solution reduced distinctly from 2.84 mF to 0.041 mF.It indicated that the GCL2-D1 formed a compact film on the metal surface

resulting in inhibition of metal corrosion.

关键词

Keywords

references

Views

166

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Fabrication of boron-doped diamond nanorods electrode and related electrochemical research

Corrosion inhibition mechanism of tween-60 for cold rolled steel in hydrochloric acid solution

Study on microwave enhanced removal performance of organic matter in coking waste salt

Prediction model for COD in petrochemical wastewater influent based on temporal-spatial dual-stream convolutional neural network

Study on entropy wave production and dissipation in partially premixed swirl flames subject to inlet perturbations

Related Author

LUO Daibing

ZHI Jinfang

MU Guannan

LI Xianghong

QU Qing

ZHOU Jun

Related Institution

中国科学院理化技术研究所光电功能界面材料实验室

云南大学化学系

⁰