Effect of Corrosion and Surface Roughness on Wettability of ASTM A36 Steel

1) After 76 h of corrosion, the initial contact angle of ASTM A36 steel was reduced by 80%. Therefore, increasing the I N corrosion increases the water wettability of ASTM A36 steel, making it more hydrophilic.

2) The contact angle after the test piece is reduced by 40%. S was only exposed to 4 hours of corrosion. Therefore, early corrosion of ASTM A36 steel is important because the wettability of the steel is significantly increased at the beginning of the corrosion.

3) Continued When the average roughness of the sample increases from 12 nm to 59 μm, the ACT angle decreases from 88° to 15°. This is equivalent to a significant 83% drop in contact angle. With this, the results show that the surface roughness caused by the corrosion process or the grinding and polishing process has a great influence on the wettability of the steel. Increased Surface Roughness The wettability of ASTM A36 steel is manifested by a reduction in contact angle. Conversely, a decrease in surface roughness increases the contact angle and increases the contact angle. When the average surface roughness is less than 50 nm, the T angle is larger.

The high surface roughness caused by non-uniform surface corrosion is more critical in affecting the surface roughness of the Vectra. The finish of the steel relative to the surface roughness caused by the relatively uniform process formed by grinding and polishing. In addition, the wettability of ASTM A36 Steel is more sensitive to In. Surface roughness increases. When the roughness average (Ra) is increased to 2 μm, the wettability increases faster. When the average value of roughness exceeds 2 μm, the wetting rate increases. The density is reduced. 5) Samples with higher surface roughness (Ra = 495.78 nm) and lower surface roughness (Ra = 15.74 nm and 12.40 nm) were visually inspected after accelerated corrosion for 4 h. Samples with lower surface roughness experienced Less corrosion.


Katalor Enterprises has established a full set of strict quality control system,advanced manufacturing technics and equipments. As a ASTM A36 Steel stockist and supplier, if you have any demand of ASTM A36 Steel price, please do not hesitate to contact us .

 

Pre: Useful information for 42CrMo4 Steel’s specification and chemical composition

Next: Optimization control of A36 high strength shipboard steel production process