Nanoparticles Protect Steel from Corrosion
TEHRAN (FNA)- A novel method for prevention of steel corrosion has been proposed at Sharif University of Technology, Iran using nanotechnology.
Nastaran Barati, the researcher of this study used dioxide titanium nanoparticle, a ceramic semiconductor, for coating the surface of steel in order to improve its resistance to corrosion and for cathodic protection.
When the coated steel sample is subjected to corrosive environments like sea water, TiO2 coating acts as anode and prevents the corrosion of steel surface. TiO2 is not destroyed through anodic reaction due to its photocatalytic property and production of electron-hole couple under UV irradiation.
"In these kinds of coatings the optimum conditions should be met so that the coating covers the whole surface. Otherwise, a galvanic cell may be formed which causes steel base to act as anode and corrode," Barati told INIC.
She used sol-gel method and primary alkoxide material to improve stainless steel resistance.
For this purpose, she first prepared stable sol from titanium oxide nanoparticles and coated stainless steel samples by the sol resulting from submerging method.
In the next step, the researcher examined different parameters affecting coating properties and selected optimum conditions to create an even coating and anataz nanostructure.
"By using these coatings we can improve the corrosion properties of L316 stainless steel in the environments containing chlorine," Barati reiterated.
The method proposed in this study could be applied for coating pipelines, ships, dock structures, floating structures, submarines, ships vessels, and storage vessels of oil and water.
http://english.farsnews.net/newstext.php?nn=8807090432
TEHRAN (FNA)- A novel method for prevention of steel corrosion has been proposed at Sharif University of Technology, Iran using nanotechnology.
Nastaran Barati, the researcher of this study used dioxide titanium nanoparticle, a ceramic semiconductor, for coating the surface of steel in order to improve its resistance to corrosion and for cathodic protection.
When the coated steel sample is subjected to corrosive environments like sea water, TiO2 coating acts as anode and prevents the corrosion of steel surface. TiO2 is not destroyed through anodic reaction due to its photocatalytic property and production of electron-hole couple under UV irradiation.
"In these kinds of coatings the optimum conditions should be met so that the coating covers the whole surface. Otherwise, a galvanic cell may be formed which causes steel base to act as anode and corrode," Barati told INIC.
She used sol-gel method and primary alkoxide material to improve stainless steel resistance.
For this purpose, she first prepared stable sol from titanium oxide nanoparticles and coated stainless steel samples by the sol resulting from submerging method.
In the next step, the researcher examined different parameters affecting coating properties and selected optimum conditions to create an even coating and anataz nanostructure.
"By using these coatings we can improve the corrosion properties of L316 stainless steel in the environments containing chlorine," Barati reiterated.
The method proposed in this study could be applied for coating pipelines, ships, dock structures, floating structures, submarines, ships vessels, and storage vessels of oil and water.
http://english.farsnews.net/newstext.php?nn=8807090432
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