Statistical assessment of damnification risk due to inconformity of paint coating quality

Introduction. In connection with the increase in the proportion of paint compositions in the decoration of buildings and the actualization of the building structure finishing quality issues, it is necessary to determine the degree of damnification risk if the quality of paints and coatings does not conform to requirements. Materials and methods. In order to assess the risk in the work, the study used polyvinyl acetate cement (PVAC) paint, MA-15 oil paint, PF-115 alkyd paint, AK-111 water-dispersion acrylic paint, KO-168 organic-silicone paint, and PI polymer lime paint as paint compositions. The risk was considered as the probability of an event that harms the paint coating. In addition to this, a calculation of the risk R as the expected damage Y due to destruction of the coating was performed. Results. The research has established that some coatings are characterized by lower uniformity of adhesion strength values than it is required on the grounds of the relation between the actual and normative coefficients of variation. The values of risk r indicate that the probability of adhesive destruction is minimal. The calculation of the risk R as the expected damage Y because of the coating destruction due to the violation of adhesion showed that the maximum risk R values are from 0.068 to 11.18 rubles per square meter. Conclusions. It is established that the probability of paint coating adhesive destruction is minimal. The values of risk as expected damage because of coating adhesive destruction are from 0.068 to 11.18 rubles per square meterб depending on the coating type. When making a managerial decision on a paint production, a risk of economic damage should be estimated.