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YARNA Store is dedicated to finding the best alternative solution for treating hard water. Your water will be salt-free while maintaining nutrients. YARNA Store just make sure they don't stick to your tubes anymore, drying your skin and staining your clothes. In short, cathodic protection is a method of protecting metals from corrosion based on physical principles. This is essential for metal pipes, ships and vessels that must be kept in water for long periods of time. It also provides protection against corrosion of steel structures buried in soil. While this may sound like nonsense, it's actually easy to understand why it matters. The basic principle of cathodic protection is to connect an external anode to a metal to protect it. An electric current then passes between them, so that the metal becomes a cathode and does not corrode.