省部共建国重室陈正教授团队在含硫酸盐混凝土中钢筋的脱钝化机理研究中取得研究进展-特色金属材料与组合结构全寿命安全国家重点实验室

省部共建国重室陈正教授团队在含硫酸盐混凝土中钢筋的脱钝化机理研究中取得研究进展

2024年05月22日 17:00 点击：[]

近日，省部共建国重室陈正教授研究团队在含硫酸盐混凝土中钢筋的脱钝化机理研究中取得进展，相关工作以"Mechanism of rebar depassivation in concrete containing sulphate: A vicious cycle between sulphate adsorption and surface vacancy formation"为题，发表在《Corrosion Science》上。

硫酸盐引起的钢筋腐蚀会影响混凝土结构的使用寿命。然而，这一问题背后的相关机制尚不清楚，因此值得进一步研究。为了填补这一空白，本研究进行了OCP、EIS和LPR三个电化学实验，并进行了XPS和SEM表征。此外，采用密度泛函理论(DFT)模拟了钢筋在硫酸盐条件下的脱钝化行为。综上所述，揭示了潜在的机制。结果表明，硫酸盐离子的存在降低了钢筋钝化膜的厚度和外层Fe³⁺/Fe²⁺的比值;在饱和Ca(OH)₂溶液中，[SO₄²⁻]/[OH⁻]引起钢筋失钝化的阈值为1.26 ~ 1.51。然后，分别选择原始表面和含有空位的α-Fe₂O₃(001)表面，通过DFT模拟钢筋周围的钝化膜表面。结果表明，SO₄²⁻的吸附促进了表面空位的形成，并且与原始表面相比，SO₄²⁻覆盖率的增加也促进了含O空位表面上Fe空位的形成。然后，Fe-O对空位形成，进而促进了SO₄²⁻在钢筋钝化膜上的后续吸附。结合实验结果和DFT模拟，认为硫酸盐诱导钢筋脱钝化过程存在一个恶性循环，具体表现为(i)对SO₄²⁻的吸附，(ii)空位的形成和增加，以及(iii)对SO₄²⁻的吸附逐渐增强。

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'tid' => '1', 'pid' => '11', 'mid' => 'news', 'pids' => '0,11', 'name' => '科研队伍', 'dirname' => 'keyanduiwu', 'pdirname' => 'shouye/', 'child' => 1, 'disabled' => '0', 'ismain' => 1, 'childids' => '24,51,52,53,54', 'thumb' => '', 'show' => '1', 'content' => '', 'setting' => array ( 'disabled' => '0', 'linkurl' => '', 'getchild' => '0', 'notedit' => '0', 'urlrule' => 0, 'seo' => array ( 'list_title' => '[第{page}页{join}]{catpname}{join}{SITE_NAME}', 'list_keywords' => '', 'list_description' => '', ), 'template' => array ( 'pagesize' => '20', 'mpagesize' => '20', 'page' => 'page.html', 'list' => 'listimg.html', 'category' => 'listimg.html', 'search' => 'search.html', 'show' => 'show.html', ), 'cat_field' => NULL, 'module_field' => NULL, 'html' => 0, ), 'displayorder' => '0', 'pcatpost' => 0, 'topid' => '11', 'catids' => array ( 0 => '24', 1 => '51', 2 => '52', 3 => '53', 4 => '54', ), 'is_post' => 0, 'url' => 'http://wei.vialancer.com/index.php?c=category&id=24', 'total' => '请使用count标签查询', 'field' => array ( ), ), 25 => array ( 'id' => '25', 'tid' => '1', 'pid' => '11', 'mid' => 'news', 'pids' => '0,11', 'name' => '研究团队', 'dirname' => 'yjtd', 'pdirname' => 'shouye/', 'child' => 0, 'disabled' => '0', 'ismain' => 1, 'childids' => 25, 'thumb' => '', 'show' => '1', 'content' => '', 'setting' => array ( 'disabled' => '0', 'linkurl' => '', 'getchild' => '0', 'notedit' => '0', 'urlrule' => 0, 'seo' => array ( 'list_title' => '[第{page}页{join}]{catpname}{join}{SITE_NAME}', 'list_keywords' => '', 'list_description' => '', ), 'template' => array ( 'pagesize' => '20', 'mpagesize' => '20', 'page' => 'page.html', 'list' => 'list.html', 'category' => 'category.html', 'search' => 'search.html', 'show' => 'show.html', ), 'cat_field' => NULL, 'module_field' => NULL, 'html' => 0, ), 'displayorder' => '0', 'pcatpost' => 0, 'topid' => '11', 'catids' => array ( 0 => '25', ), 'is_post' => 1, 'url' => 'http://wei.vialancer.com/index.php?c=category&id=25', 'total' => '请使用count标签查询', 'field' => array ( ), ), )
urlrule	'/index.php?c=show&id=27&page=[page]'
fix_html_now_url	''
my_web_url	'http://wei.vialancer.com/index.php?c=show&id=27'
get	array ( 'c' => 'show', 'id' => '27', )

省部共建国重室陈正教授团队在含硫酸盐混凝土中钢筋的脱钝化机理研究中取得研究进展

友情链接

联系我们

联系我们

Database (5 Queries across 0 Connection)

Views

运行时间：0.01ms

模板文件

引用提示

模板变量

Files ( 148 )

Routes

Events

History

View Data

Session User Data

Request ( HTTP/1.1 )

$_GET

Headers

Cookies

Response ( 200 - OK )

Headers

System Configuration

App.php	APPPATH/Config/App.php
Auto.php	FCPATH/App/Module/Config/Auto.php
Autoload.php	APPPATH/Config/Autoload.php
AutoloadConfig.php	APPPATH/System/Config/AutoloadConfig.php
Autoloader.php	APPPATH/System/Autoloader/Autoloader.php
BaseBuilder.php	APPPATH/System/Database/BaseBuilder.php
BaseCollector.php	APPPATH/System/Debug/Toolbar/Collectors/BaseCollector.php
BaseConfig.php	APPPATH/System/Config/BaseConfig.php
BaseConnection.php	APPPATH/System/Database/BaseConnection.php
BaseHandler.php	APPPATH/System/Cache/Handlers/BaseHandler.php
BaseResult.php	APPPATH/System/Database/BaseResult.php
BaseService.php	APPPATH/System/Config/BaseService.php
Builder.php	APPPATH/System/Database/MySQLi/Builder.php
Cache.php	APPPATH/Config/Cache.php
Cache.php	APPPATH/Extend/Cache.php
Cache.php	FCPATH/Fcms/Library/Cache.php
CacheFactory.php	APPPATH/System/Cache/CacheFactory.php
CacheInterface.php	APPPATH/System/Cache/CacheInterface.php
Category.php	FCPATH/App/Module/Action/Category.php
CliRenderer.php	APPPATH/System/ThirdParty/Kint/Renderer/CliRenderer.php
CodeIgniter.php	APPPATH/Extend/CodeIgniter.php
CodeIgniter.php	APPPATH/System/CodeIgniter.php
Common.php	APPPATH/System/Common.php
Config.php	APPPATH/System/Config/Config.php
Config.php	APPPATH/System/Database/Config.php
Connection.php	APPPATH/System/Database/MySQLi/Connection.php
ConnectionInterface.php	APPPATH/System/Database/ConnectionInterface.php
Constants.php	APPPATH/Config/Constants.php
Content.php	FCPATH/App/Module/Models/Content.php
Content.php	FCPATH/Fcms/Model/Content.php
ContentSecurityPolicy.php	APPPATH/Config/ContentSecurityPolicy.php
ContentSecurityPolicy.php	APPPATH/System/HTTP/ContentSecurityPolicy.php
Controller.php	APPPATH/Extend/Controller.php
Controller.php	APPPATH/System/Controller.php
Database.php	APPPATH/Config/Database.php
Database.php	APPPATH/System/Database/Database.php
Database.php	APPPATH/System/Debug/Toolbar/Collectors/Database.php
Date.php	FCPATH/Fcms/Field/Date.php
DebugToolbar.php	APPPATH/System/Filters/DebugToolbar.php
DotEnv.php	APPPATH/System/Config/DotEnv.php
Editor.php	FCPATH/Fcms/Field/Editor.php
Events.php	APPPATH/Config/Events.php
Events.php	APPPATH/System/Debug/Toolbar/Collectors/Events.php
Events.php	APPPATH/System/Events/Events.php
Exceptions.php	APPPATH/Config/Exceptions.php
Exceptions.php	APPPATH/Extend/Exceptions.php
Exceptions.php	APPPATH/System/Debug/Exceptions.php
Factories.php	APPPATH/System/Config/Factories.php
Factory.php	APPPATH/System/Config/Factory.php
Field.php	FCPATH/Fcms/Library/Field.php
File.php	FCPATH/Fcms/Field/File.php
FileHandler.php	APPPATH/System/Cache/Handlers/FileHandler.php
FileLocator.php	APPPATH/System/Autoloader/FileLocator.php
Files.php	APPPATH/System/Debug/Toolbar/Collectors/Files.php
FilterInterface.php	APPPATH/System/Filters/FilterInterface.php
Filters.php	APPPATH/Config/Filters.php
Filters.php	APPPATH/System/Filters/Filters.php
Header.php	APPPATH/System/HTTP/Header.php
Helper.php	FCPATH/Fcms/Core/Helper.php
Hook.php	APPPATH/Extend/Hook.php
Hooks.php	FCPATH/App/Module/Config/Hooks.php
Hooks.php	FCPATH/Fcms/Core/Hooks.php
IncomingRequest.php	APPPATH/System/HTTP/IncomingRequest.php
Init.php	APPPATH/Init.php
Init.php	FCPATH/Fcms/Init.php
Input.php	FCPATH/Fcms/Library/Input.php
Kint.php	APPPATH/Config/Kint.php
Kint.php	APPPATH/System/ThirdParty/Kint/Kint.php
Lang.php	FCPATH/Fcms/Library/Lang.php
Logger.php	APPPATH/Config/Logger.php
Logger.php	APPPATH/System/Log/Logger.php
LoggerInterface.php	APPPATH/System/ThirdParty/PSR/Log/LoggerInterface.php
Logs.php	APPPATH/System/Debug/Toolbar/Collectors/Logs.php
Member.php	FCPATH/Fcms/Model/Member.php
Message.php	APPPATH/System/HTTP/Message.php
MessageInterface.php	APPPATH/System/HTTP/MessageInterface.php
MessageTrait.php	APPPATH/System/HTTP/MessageTrait.php
Model.php	APPPATH/Extend/Model.php
Model.php	FCPATH/Fcms/Core/Model.php
Module.php	FCPATH/App/Module/Extends/Home/Module.php
Modules.php	APPPATH/Config/Modules.php
Modules.php	APPPATH/System/Modules/Modules.php
Paths.php	APPPATH/Config/Paths.php
Phpcmf.php	FCPATH/Fcms/Core/Phpcmf.php
Query.php	APPPATH/System/Database/Query.php
QueryInterface.php	APPPATH/System/Database/QueryInterface.php
Related.php	FCPATH/App/Module/Action/Related.php
Renderer.php	APPPATH/System/ThirdParty/Kint/Renderer/Renderer.php
RendererInterface.php	APPPATH/System/View/RendererInterface.php
Request.php	APPPATH/Extend/Request.php
Request.php	APPPATH/System/HTTP/Request.php
RequestInterface.php	APPPATH/System/HTTP/RequestInterface.php
RequestTrait.php	APPPATH/System/HTTP/RequestTrait.php
Response.php	APPPATH/System/HTTP/Response.php
ResponseInterface.php	APPPATH/System/HTTP/ResponseInterface.php
ResponseTrait.php	APPPATH/System/API/ResponseTrait.php
ResponseTrait.php	APPPATH/System/HTTP/ResponseTrait.php
Result.php	APPPATH/System/Database/MySQLi/Result.php
ResultInterface.php	APPPATH/System/Database/ResultInterface.php
RichRenderer.php	APPPATH/System/ThirdParty/Kint/Renderer/RichRenderer.php
RouteCollection.php	APPPATH/System/Router/RouteCollection.php
RouteCollectionInterface.php	APPPATH/System/Router/RouteCollectionInterface.php
Router.php	APPPATH/System/Router/Router.php
Router.php	FCPATH/Fcms/Library/Router.php
RouterInterface.php	APPPATH/System/Router/RouterInterface.php
Routes.php	APPPATH/Config/Routes.php
Routes.php	APPPATH/Extend/Routes.php
Routes.php	APPPATH/System/Config/Routes.php
Routes.php	APPPATH/System/Debug/Toolbar/Collectors/Routes.php
Security.php	FCPATH/Fcms/Library/Security.php
Seo.php	FCPATH/Fcms/Library/Seo.php
Service.php	FCPATH/Fcms/Core/Service.php
Services.php	APPPATH/Config/Services.php
Services.php	APPPATH/System/Config/Services.php
Show.php	FCPATH/Fcms/Control/Show.php
Text.php	FCPATH/Fcms/Field/Text.php
TextRenderer.php	APPPATH/System/ThirdParty/Kint/Renderer/TextRenderer.php
Textarea.php	FCPATH/Fcms/Field/Textarea.php
Timer.php	APPPATH/System/Debug/Timer.php
Timers.php	APPPATH/System/Debug/Toolbar/Collectors/Timers.php
Toolbar.php	APPPATH/Config/Toolbar.php
Toolbar.php	APPPATH/System/Debug/Toolbar.php
URI.php	APPPATH/System/HTTP/URI.php
UserAgent.php	APPPATH/System/HTTP/UserAgent.php
UserAgents.php	APPPATH/Config/UserAgents.php
Utils.php	APPPATH/System/ThirdParty/Kint/Utils.php
Version.php	FCPATH/My/Config/Version.php
View.php	APPPATH/Config/View.php
View.php	APPPATH/Extend/View.php
View.php	APPPATH/System/Config/View.php
View.php	APPPATH/System/View/View.php
View.php	FCPATH/Fcms/Core/View.php
Views.php	APPPATH/System/Debug/Toolbar/Collectors/Views.php
custom.php	/webdata/wei/config/custom.php
database.php	/webdata/wei/config/database.php
domain_app.php	/webdata/wei/cache/config/domain_app.php
domain_client.php	/webdata/wei/cache/config/domain_client.php
hooks.php	/webdata/wei/config/hooks.php
index.php	/webdata/wei/index.php
init.php	APPPATH/System/ThirdParty/Kint/init.php
init_helpers.php	APPPATH/System/ThirdParty/Kint/init_helpers.php
lang.php	/webdata/wei/api/language/zh-cn/lang.php
site.php	/webdata/wei/cache/config/site.php
system.php	/webdata/wei/cache/config/system.php
template_DS_pc_DS_default_DS_home_DS_footer.html.cache.php	/webdata/wei/cache/template/template_DS_pc_DS_default_DS_home_DS_footer.html.cache.php
template_DS_pc_DS_default_DS_home_DS_header.html.cache.php	/webdata/wei/cache/template/template_DS_pc_DS_default_DS_home_DS_header.html.cache.php
template_DS_pc_DS_default_DS_home_DS_show.html.cache.php	/webdata/wei/cache/template/template_DS_pc_DS_default_DS_home_DS_show.html.cache.php
url_helper.php	APPPATH/System/Helpers/url_helper.php

File:	/webdata/wei/dayrui/Fcms/Control/Show.php
App:	/
Controller:	show
Method:	index
URI:	show/index
URL:	http://wei.vialancer.com/index.php?c=show&id=27

Datetime	Status	Method	URL	Content-Type	Is AJAX?
2023-07-25 14:40:22	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 14:40:18	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:50:35	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:50:33	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:50:31	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:50:29	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:50:25	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:50:20	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:50:18	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:50:16	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:50:12	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:50:06	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:50:03	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:49:39	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 11:49:36	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 09:50:02	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 09:36:57	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 09:35:42	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-25 09:33:16	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No
2023-07-24 17:45:43	200	GET	http://wei.vialancer.com/	text/html; charset=UTF-8	No

Cookie	pgv_pvi=2798497912
Accept-Language	zh-CN,zh;q=0.9
Accept-Encoding	gzip, deflate
Referer	http://wei.vialancer.com/index.php?c=category&id=12
Accept	text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3;q=0.7
User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36
Upgrade-Insecure-Requests	1
Connection	keep-alive
Host	wei.vialancer.com

CodeIgniter Version:	4.0.5
PHP Version:	7.2.16
PHP SAPI:	fpm-fcgi
Environment:	development
Base URL:	http://wei.vialancer.com/
Timezone:	PRC
Locale:	en
Content Security Policy Enabled:	No

Time	Event Name	Times Called
4.91 ms	pre_system	1
0.05 ms	dbquery	5

省部共建国重室陈正教授团队在含硫酸盐混凝土中钢筋的脱钝化机理研究中取得研究进展

友情链接

联系我们

联系我们

4.0.5

Database (5 Queries across 0 Connection)

Views

运行时间：0.01ms

模板文件

引用提示

模板变量

Files ( 148 )

Routes

Events

History

View Data

Session User Data

Request ( HTTP/1.1 )

$_GET

Headers

Cookies

Response ( 200 - OK )

Headers

System Configuration