Cathodic Protection - Required Current

Required cathodic protection current for hull underwater area given current density and coating condition - screen ICCP / sacrificial anode sizing.

CathodicICCPSacrificial

Underwater aream²Coating conditionSeawater temperature°C

Protection current: 84.5A

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

I = A \cdot i \cdot k_T

Symbol	Meaning	Unit
$A$	Underwater area	m²
$i$	Current density	mA/m²
$k_T$	Temperature factor

Source: DNV-RP-B401 Cathodic Protection

In short

Required cathodic protection current for hull underwater area given current density and coating condition - screen ICCP / sacrificial anode sizing.

Learn the theory Marine Cathodic Protection and Hull Coatings