28The first enemy of a padlock are potential attackers, but, especially if used outdoors, immediately afterwards they are rain, salinity and dust, which in the long run may corrode it, let it rust and block it, such as to render it useless. These harsh climatic conditions are to be found especially close to the sea, but acid rain in towns or temperature fluctuations in the mountains can also put a strain on padlocks.
To cope with these problems most manufacturers have padlocks in their catalogue which are usually referred to as “marine “ because they have features which make them more resistant to moisture and salinity in the air, which is particularly high near to the sea. Generally, the differences compared with the basic models are that at least the hardened steel shackle is replaced with one made of stainless steel and that the brass body is chrome-plated, to make it resistant to corrosion.
However, the weak point of almost all the so-called “marine” padlocks is that the internal components are not modified. An aspect which indicates that the internal components have probably not been optimised to resist rust and corrosion is the presence of a rubber gasket between the body and the shackle.
The purpose of the gasket is to protect the internal components by limiting the entrance of moisture.
The stainless steel shackle and the chrome-plated body definitely help to make the padlock more resistant to moisture, but unfortunately they are not enough to withstand the most extreme conditions, when high levels of humidity are combined with corrosion by salt. In these cases it is necessary to use locks, such as the Viro “Sea” series, which are designed and constructed specifically to withstand the harshest environmental conditions. Each individual lock component is reviewed and optimised, and nothing is left to chance:
The shackle is made of stainless steel in order to be unaffected by rust and corrosion.
The solid brass body has a copper-finish, is nickel-plated and chrome-plated with chemical treatments of the highest quality and with considerable thicknessesto achieve maximum corrosion resistance.
The inside of the body has bores and outlets which allow the moisture to escape without stagnating inside.
The size of the internal components and the drain hole also allow the residues left by the salt to be eliminated during use, thus preventing the mechanism from being blocked.
The springs of the latches and the shackle are made of stainless steel to make them resistant to rust and corrosion.
An armoured padlock or a monoblock padlock is recommended where maximum resistance is needed to withstand possible attacks, but a Viro “Sea” series padlock may be the right solution where you have to deal with particularly aggressive climatic conditions in order to simultaneously achieve both security and reliability over time.