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Old 04-09-2010, 03:20 AM   #1
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Hi All

Perhaps a silly question, but i have always been told the silly one is the one you didn't ask!

I am putting some latches on the cockpit lockers on the boat (GRP) and they are made of 304 grade stainless steel. I have some 18-10 S/S screws I was going to use- but is it ok to mix these? I know that mixing different metals types is a fine recipe for electrolysis, but does that apply to different grades of S/S as well? Its not exactly in a critical location, but I don't want rust stains on my lockers!

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Dan
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Old 04-09-2010, 05:17 AM   #2
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Hello Dan,

Even though the latches are 304 S/S and out in the Cockpit and subjected to the elements, they should be OK - if they get soaked in Sea Water wash them down with fresh and once dry, apply (mixture used cooking oil and natural turps)

The use of 316 S/S screws in the latches - no prob.
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Old 04-09-2010, 05:43 AM   #3
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Often different SS alloys mixed will quickly cause rust on the less corrosion resistant stainless. Also, they can bind/rust together. Above the waterline (not in the water), you CAN mix SS and bronze fasteners/nuts or hardware/fasteners with greater success than two different SS alloys in terms of rust and seizing. The bronze will, of course, turn green as it does anyway but the SS/bronze combo won't rust the stainless and it won't seize up like two different stainless alloys will.

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