The Effects of Shot and Grit Blasting Process Parameters on Steel Pipes Coating Adhesion
Adhesion strength of exterior or interior coating of
steel pipes is too important. Increasing of coating adhesion on
surfaces can increase the life time of coating, safety factor of
transmitting line pipe and decreasing the rate of corrosion and costs.
Preparation of steel pipe surfaces before doing the coating process is
done by shot and grit blasting. This is a mechanical way to do it.
Some effective parameters on that process, are particle size of
abrasives, distance to surface, rate of abrasive flow, abrasive physical
properties, shapes, selection of abrasive, kind of machine and its
power, standard of surface cleanness degree, roughness, time of
blasting and weather humidity. This search intended to find some
better conditions which improve the surface preparation, adhesion
strength and corrosion resistance of coating. So, this paper has
studied the effect of varying abrasive flow rate, changing the
abrasive particle size, time of surface blasting on steel surface
roughness and over blasting on it by using the centrifugal blasting
machine. After preparation of numbers of steel samples (according to
API 5L X52) and applying epoxy powder coating on them, to
compare strength adhesion of coating by Pull-Off test. The results
have shown that, increasing the abrasive particles size and flow rate,
can increase the steel surface roughness and coating adhesion
strength but increasing the blasting time can do surface over blasting
and increasing surface temperature and hardness too, change,
decreasing steel surface roughness and coating adhesion strength.
[1] A. Qanbarzadeh, "Surface Preparation", first ed., Tehran, Iran, 2007.
[2] A. Baldan, "Review adhesively-bonded joints and repair in metallic
alloys polymers and composite materials: Adhesives Adhesion theories
and surface pre-treatment", Journal of materials science, 39, 2004, pp.
1-49.
[3] NIST Special Publication 1035, "Coatings for Corrosion Protection:
Offshore Oil and Gas Operation Facilities, Marine Pipeline and Ship
Structures", April 2004, pp. 14-16.
[4] L. NIU, Y.F. Cheng, "Development of innovative coating technology for
pipe line operation crossing the permafrost terrain, Construction and
building Material", 2008, 22, pp. 417-422.
[5] E. Metabrasive, "Training course blasting using wheel machines",
England, 2009.
[6] S.H. Leigh, C.C. Berndt, "A test for coating adhesion on flat substratesa
technical note, Journal of thermal spray technology, Vol. 3(2), June
1994, pp. 184-190.
[7] International Organization for Standardization, "Paints and Varnishes-
Pull-Off Test for Adhesion", ISO 4624, 2004.
[8] A.W. Momber, Y.C. Wong, "Over Blasting Effects on Surface
Properties of Low-Carbon Steel", April 2005, pp. 453-461.
[1] A. Qanbarzadeh, "Surface Preparation", first ed., Tehran, Iran, 2007.
[2] A. Baldan, "Review adhesively-bonded joints and repair in metallic
alloys polymers and composite materials: Adhesives Adhesion theories
and surface pre-treatment", Journal of materials science, 39, 2004, pp.
1-49.
[3] NIST Special Publication 1035, "Coatings for Corrosion Protection:
Offshore Oil and Gas Operation Facilities, Marine Pipeline and Ship
Structures", April 2004, pp. 14-16.
[4] L. NIU, Y.F. Cheng, "Development of innovative coating technology for
pipe line operation crossing the permafrost terrain, Construction and
building Material", 2008, 22, pp. 417-422.
[5] E. Metabrasive, "Training course blasting using wheel machines",
England, 2009.
[6] S.H. Leigh, C.C. Berndt, "A test for coating adhesion on flat substratesa
technical note, Journal of thermal spray technology, Vol. 3(2), June
1994, pp. 184-190.
[7] International Organization for Standardization, "Paints and Varnishes-
Pull-Off Test for Adhesion", ISO 4624, 2004.
[8] A.W. Momber, Y.C. Wong, "Over Blasting Effects on Surface
Properties of Low-Carbon Steel", April 2005, pp. 453-461.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:55224", author = "Saeed Khorasanizadeh", title = "The Effects of Shot and Grit Blasting Process Parameters on Steel Pipes Coating Adhesion", abstract = "Adhesion strength of exterior or interior coating of
steel pipes is too important. Increasing of coating adhesion on
surfaces can increase the life time of coating, safety factor of
transmitting line pipe and decreasing the rate of corrosion and costs.
Preparation of steel pipe surfaces before doing the coating process is
done by shot and grit blasting. This is a mechanical way to do it.
Some effective parameters on that process, are particle size of
abrasives, distance to surface, rate of abrasive flow, abrasive physical
properties, shapes, selection of abrasive, kind of machine and its
power, standard of surface cleanness degree, roughness, time of
blasting and weather humidity. This search intended to find some
better conditions which improve the surface preparation, adhesion
strength and corrosion resistance of coating. So, this paper has
studied the effect of varying abrasive flow rate, changing the
abrasive particle size, time of surface blasting on steel surface
roughness and over blasting on it by using the centrifugal blasting
machine. After preparation of numbers of steel samples (according to
API 5L X52) and applying epoxy powder coating on them, to
compare strength adhesion of coating by Pull-Off test. The results
have shown that, increasing the abrasive particles size and flow rate,
can increase the steel surface roughness and coating adhesion
strength but increasing the blasting time can do surface over blasting
and increasing surface temperature and hardness too, change,
decreasing steel surface roughness and coating adhesion strength.", keywords = "surface preparation, abrasive particles, adhesionstrength", volume = "4", number = "6", pages = "493-9", }