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McGarry and Madsen's home inspection blog for buyers of
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Why is my pool ladder rusting?
Sunday, April 4, 2021
A stainless steel pool ladder with premature rust or pitting is usually caused by either low or high salt at a salt water pool, or low ph at a chlorine pool. The example shown in the photos above and below was at a pool at a vacant house with the red “low salt” warning light lit at the chlorine generator panel. So that was likely the primary cause.
But another factor that can corrode stainless steel is a ladder that is not properly grounded. This allows galvanic corrosion, which is an electrochemical disintegration that happens when metals are in contact with an electrically conductive liquid, typically water. See our article When was pool bonding first required by code? for more on this.
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