cara menghitung laju korosi mpy, how to calculate corrosion rate corrosion coupon

The weight loss is converted to a corrosion rate (CR) or metal loss (ML), as follows:

The constant can be varied to calculate the corrosion rate in various units: 

Desired Corrosion Rate Unit (CR)	Area Unit (A)	K-Factor
mils/year (mpy)	in2	5.34 x 105
mils/year (mpy)	cm2	3.45 x 106
millimeters/year (mmy)	cm2	8.76 x 104

Desired Metal Loss Unit (ML)	Area Unit (A)	K-Factor
mils	in2	61.02
mils	cm2	393.7
millimeters	cm2	10.0