5. Follow-up

The properties of the aqueous fluid in service are constantly changing. The main causes of this phenomenon are:

• non-emulsified additives;

• the presence of metallic microparticles;

• the absence of filtration or inadequate filtration;

• increased mineral salts and chlorides in water;

• maintenance oil pollution, combined with a lack of oil removal;

• failure to comply with concentrations (poor preparation and/or poor monitoring);

• etc.