The most common type of coupon is the strip corrosion coupon used in most cases. These types of coupons have the highest contact levels compared to other coupons, and due to high contact levels, corrosion and weight loss mechanisms are more visible. Its dimensions typically as bellow:
Strip type( 3 inch):
76.2 x 19 x 3.2 mm (3 x 1 x 1/8 inches). Usually these coupons have two holes for mounting and the surface is in good contact for a corrosion test of about 3000 mm².
Strip type( 2 inch or china type):
50.8 x 19 x 3 mm (3 x 1 x 1/8 inches). Usually these coupons have two holes for mounting and the surface is in good contact for a corrosion test of about 2000 mm².
Strip type( 3 inch narrow type):
In cases where the pipe size do not let the common coupons the narrow type coupons are used. This coupons has the dimension of 76.2 x 12.7x 1.6 mm (3 x ½ x 1/16 inches). coupons with two retaining holes The useful level is 1700 mm².
Usually coupons are made of low-carbon steel, stainless steel, copper, bronze, brass and Inconel. Nevertheless, Mirab Industries declares its readiness to design and build coupons with other materials on the order of the buyer.