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The Do Not’s and Do’s of Stainless Steel Fasteners

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Update time : 2022-01-19 13:03:47

1 DO: Choose The Correct Standard.

There are various grades of stainless steel. The two most popularly employed steel standards are 316 and 304, with 316 standards posing more resistance to corrosion than 304. The basic rule is that if the stainless-steel fastener is inside a corrosive atmosphere (for example, within five kilometres away from the shore). Three hundred and sixteen is desirable if the fastener has to be seen as three hundred and sixteen is less probable to tea-stain or establish a brown discoloration.
 

2 Do: Lubricate Threads

Leading stainless fastener engineers have recommended that every stainless-steel thread be lubricated before being assembled to reduce the galling risk (that is, whenever threads lock up). We discovered that the most galling risk is with more extensive threads (M16 upwards) And Nylon Nuts.
 

3 Do: Choose The Correct Surface Finish

The evener or more refined the finishing, the more excellent resistance stainless steel poses. Some stainless goods have a rougher, satin, or brushed finishing, for example, sometimes on downpipes, fittings, and hinges. This kind of finishing can trap small particles such as salt, which destroys the protecting chromium oxide layer found on the stainless steel, resulting in tea-staining and thus seeming rusty. This becomes worse if the stainless steel is not exposed to rainwater to wash off the particles.
 

4 Do: Take Electropolishing Into Consideration

Electropolishing or passivating acid treatment enhances corrosion resistance. It does so by deepening the naturally occurring defensive chromium oxide layer that establishes on stainless steel. Every stainless-steel fastener sold by the stainless-steel fastener factory is passivated and can also be electro-polished upon demand.
 

 5 Do: Develop And Follow A Cleaning Schedule

You must clean stainless steel products to remove contaminants such as salt and thus maintain the appearance of stainless steel.
 

6 Do: Consider Exposing To Rainwater

Stainless steel poses resistance to corrosion because of its naturally occurring defensive layer of Chromium oxide. Depending on the surface finishing and grade, impurities settled on stainless steel can harm this defensive layer, permitting oxygen to respond with the iron. If the stainless steel gets exposed to rainwater, this must clean these impurities away, restoring the defensive layer of stainless steel. Thus, if the stainless steel is sheltered and is located inside a corrosive environment, consider options to improve the corrosion resistance: choose a more corrosion resistant standard; mirror finish/polished/ smooth, and electropolishing.
 

7 Do Not Contaminate

This is when your tools permit slight impurities. This rust on the stainless-steel surface kick-starts corrosion. This can also occur whenever iron fillings from steel grinding get blown onto stainless steel.
 

8 Do Not Cause Galvanic Corrosion

This is where a couple of different metals interact, react and cause corrosion—for instance, copper or lead flashings on aluminum or zinc roof. When interacting with stainless steel, other metals are likely to be harmed by galvanic corrosion, and the join is damp. We suggest you investigate solutions in which you have problems related to potential galvanic corrosion. Isolating metals with rubber or nylon barriers is a method to ensure that metals are kept apart for cutting down the risk of galvanic corrosion. However, remember, galvanic corrosion might yet occur whenever one metal may be polluted by another following the movement of water from one to another.
 

9 Don’t Unwittingly Purchase The Low Nickel Stainless Steel

Some proprietary standards with low nickel and high manganese have found their place in the market. They are being supplied as 316 or 304. Some are even printed like that. These mixtures also have low levels of chromium and do not suit the harsh conditions of Australia-particularly coastal areas. As a bolts manufacturer, you need to follow the dos and don’t guidelines given above to produce stainless steel bolts in the best possible manner.