Abstract: A hot dip metal plating bath roll preventing flaws in a steel sheet due to a bath roll, realizing stable running at a high speed, and improving the productivity of a plated steel sheet, which hot dip metal plating bath roll having vertical grooves each formed on an outer circumferential surface of the roll and including two first curved parts projecting to the outside of the roll and at least one second curved part arranged between the two first curved part and projecting to the inside of the roll and horizontal grooves each formed on an outer circumferential surface of the roll along a barrel length direction of the roll, a pitch P1 (mm) and depth d1 (mm) of the vertical grooves satisfying 1.0?P1?10, 0.2?d1?5, and d1?P1/2, a depth d2 (mm) being 60% to 150% of the depth d1 of the vertical grooves, and a width w2 (mm) of the horizontal grooves being 2 times or more of the depth d2 or 2 times or more of a radius of curvature (mm) of curved surfaces forming bottom parts of the horizontal grooves and 0.

Abstract: A hot dip metal plating bath roll preventing flaws in a steel sheet due to a bath roll, realizing stable running at a high speed, and improving the productivity of a plated steel sheet, which hot dip metal plating bath roll having vertical grooves each formed on an outer circumferential surface of the roll and including two first curved parts projecting to the outside of the roll and at least one second curved part arranged between the two first curved part and projecting to the inside of the roll and horizontal grooves each formed on an outer circumferential surface of the roll along a barrel length direction of the roll, a pitch P1 (mm) and depth d1 (mm) of the vertical grooves satisfying 1.0?P1?10, 0.2?d1?5, and d1?P1/2, a depth d2 (mm) being 60% to 150% of the depth d1 of the vertical grooves, and a width w2 (mm) of the horizontal grooves being 2 times or more of the depth d2 or 2 times or more of a radius of curvature (mm) of curved surfaces forming bottom parts of the horizontal grooves and 0.

Abstract: A spray deposit is formed by applying a spray deposit on a target object, and applying a sealer onto the spray deposit on the target object immediately after the spray deposit is applied on the target object. Thus, a thin layer of sealer components contained in the sealer is formed immediately on the spray deposit while a liquid component of the sealer volatilizes.