Question: Can metal on metal deposition be used to prevent corrosion?
About the article "Electrochemistry", section "Coating".

Candidate passages:
A sacrificial metal is a metal used as a sacrificial anode in cathodic protection that corrodes to prevent a primary metal from corrosion, galvanization or rusting. 
Corrosion inhibitors can be applied to items to help prevent rust and corrosion.
Volatile corrosion inhibitors (VCI) or vapor phase corrosion inhibitors can be provided inside a package in a pouch or can be incorporated in a saturated overwrap of special paper.
Many of these are organic salts that condense on the metal to resist corrosion.
Some films also have VCI emitting capability.
Films are available with copper ions in the polymer structure, These neutralize the corrosive gas in a package and deter rust.VCI create a neutral environment in the packaging.
It works on the principle of difference in vapour pressure and causes reaction with Metals and Non metals and also with Moisture to render it active to corrosion.
There are different forms of VCI's available like Papers, Plastics, HDPE Papers, Oils, Foams, Bubble, Emitters etc.
that can prevent corrosion at many stages. 
Crevice corrosion is a localized form of corrosion occurring in confined spaces (crevices), to which the access of the working fluid from the environment is limited.
Formation of a differential aeration cell leads to corrosion inside the crevices.
Examples of crevices are gaps and contact areas between parts, under gaskets or seals, inside cracks and seams, spaces filled with deposits and under sludge piles.
Crevice corrosion is influenced by the crevice type (metal-metal, metal-nonmetal), crevice geometry (size, surface finish), and metallurgical and environmental factors.
The susceptibility to crevice corrosion can be evaluated with ASTM standard procedures.
A critical crevice corrosion temperature is commonly used to rank a material's resistance to crevice corrosion. 
Some metal tetrahydroborates transform on heating to give metal borides.
When the borohydride complex is volatile, this decomposition pathway is the basis of chemical vapor deposition, a way of depositing thin films of metal borides.
For example, zirconium and hafnium diborides, ZrB2 and HfB2, can be prepared through CVD of the tetrahydroborates Zr(BH4)4 and Hf(BH4)4:M(BH4)4 → MB2 + B2H6 + 5H2 Metal diborides find uses as coatings because of their hardness, high melting point, strength, resistance to wear and corrosion, and good electrical conductivity.
The diboride films can be deposited on a variety of substances including glass, copper, aluminum, and steel. 
High-temperature corrosion is chemical deterioration of a material (typically a metal) as a result of heating.
This non-galvanic form of corrosion can occur when a metal is subjected to a hot atmosphere containing oxygen, sulfur or other compounds capable of oxidizing (or assisting the oxidation of) the material concerned.
For example, materials used in aerospace, power generation and even in car engines have to resist sustained periods at high temperature in which they may be exposed to an atmosphere containing potentially highly corrosive products of combustion.
The products of high-temperature corrosion can potentially be turned to the advantage of the engineer.
The formation of oxides on stainless steels, for example, can provide a protective layer preventing further atmospheric attack, allowing for a material to be used for sustained periods at both room and high temperatures in hostile conditions.
Such high-temperature corrosion products, in the form of compacted oxide layer glazes, prevent or reduce wear during high-temperature sliding contact of metallic (or metallic and ceramic) surfaces.